Virginia was a considerable colony, when Pennsylvania was occupied only by Indian tribes. In 1790, Virginia was first in rank of all the States, her number of inhabitants being 748,308. (Census Rep., 120,121.) Pennsylvania then ranked the second, numbering 434,373 persons. (Ib.) In 1860 the population of Virginia was 1,596,318, ranking the fifth; Pennsylvania still remaining the second, and numbering 2,905,115. (Ib.) In 1790 the population of Virginia exceeded that of Pennsylvania 313,925; in 1860 the excess in favor of Pennsylvania was 1,308,797. The ratio of increase of population of Virginia from 1790 to 1860 was 113.32 per cent., and of Pennsylvania in the same period, 569.03. At the same relative ratio of increase for the next seventy years, Virginia would contain a population of 3,405,265 in 1930; and Pennsylvania 19,443,934, exceeding that of England. Such has been and would continue to be the effect of slavery in retarding the progress of Virginia, and such the influence of freedom in the rapid advance of Pennsylvania. Indeed, with the maintenance and perpetuity of the Union in all its integrity, the destiny of Pennsylvania will surpass the most sanguine expectations.

The population of Virginia per square mile in 1790 was 12.19, and in 1860, 26.02; whilst that of Pennsylvania in 1790 was 9.44, and in 1860, 63.18. (Ib.) The absolute increase of the population of Virginia per square mile, from 1790 to 1860, was 13.83, and from 1850 to 1860, 2.85; whilst that of Pennsylvania from 1790 to 1860, was 53.74, and from 1850 to 1860, 12.93. (Ib.)

Area.—The area of Virginia is 61,352 square miles, and of Pennsylvania, 46,000, the difference being 15,352 square miles, which is greater, by 758 square miles, than the aggregate area of Massachusetts, Connecticut, and Delaware, containing in 1860 a population of 1,803,429. (Ib.) Retaining their respective ratios of increase per square mile from 1790 to 1860, and reversing their areas, that of Virginia in 1860 would have been 1,196,920, and of Pennsylvania 3,876,119. Reversing the numbers of each State in 1790, the ratio of increase in each remaining the same, the population of Pennsylvania in 1860 would have been 5,408,424, and that of Virginia, 926,603. Reversing both the areas and numbers in 1790, and the population of Pennsylvania would have exceeded that of Virginia in 1860 more than six millions.

Shore Line.—By the Tables of the Coast Survey, the shore line of Virginia is 1,571 miles, and of Pennsylvania only 60 miles. This vastly superior coast line of Virginia, with better, deeper, more capacious, and much more numerous harbors, unobstructed by ice, and with easy access for so many hundred miles by navigable bays and tide-water rivers leading so far into the interior, give to Virginia great advantages over Pennsylvania in commerce and every branch of industry. Indeed, in this respect, Virginia stands unrivalled in the Union. The hydraulic power of Virginia greatly exceeds that of Pennsylvania.

Mines.—Pennsylvania excels every other State in mineral wealth, but Virginia comes next.

Soil.—In natural fertility of soil, the two States are about equal; but the seasons in Virginia are more favorable, both for crops and stock, than in Pennsylvania. Virginia has all the agricultural products of Pennsylvania, with cotton in addition. The area, however, of Virginia (39,265,280 acres) being greater by 9,825,280 acres than that of Pennsylvania (29,440,000 acres), gives to Virginia vast advantages.

In her greater area, her far superior coast line, harbors, rivers, and hydraulic power, her longer and better seasons for crops and stock, and greater variety of products, Virginia has vast natural advantages, and with nearly double the population of Pennsylvania in 1790. And yet, where has slavery placed Virginia? Pennsylvania exceeds her now in numbers 1,308,797, and increased in population, from 1790 to 1860, in a ratio more than five to one. Such is the terrible contrast between free and slave institutions!

Progress of Wealth.—By Census Tables (1860) 33 and 36, it appears (omitting commerce) that the products of industry, as given, viz., of agriculture, manufactures, mines, and fisheries, were that year in Pennsylvania, of the value of $398,600,000, or $137 per capita; and in Virginia, $120,000,000 or $75 per capita. This shows a total value of product in Pennsylvania much more than three times that of Virginia, and, per capita, nearly two to one. That is, the average value of the product of the labor of each person in Pennsylvania, is nearly double that of each person, including slaves, in Virginia. Thus is proved the vast superiority of free over slave labor, and the immense national loss occasioned by the substitution of the latter for the former.

As to the rate of increase; the value of the products of Virginia in 1850 was $84,480,428 (Table 9), and in Pennsylvania, $229,567,131, showing an increase in Virginia, from 1850 to 1860, of $35,519,572, being 41 per cent.; and in Pennsylvania, $169,032,869, being 50 per cent.; exhibiting a difference of 9 per cent. in favor of Pennsylvania. By the Census Table of 1860, No. 35, p. 195, the true value then of the real and personal property was, in Pennsylvania, $1,416,501,818, and of Virginia, $793,249,681. Now, we have seen, the value of the products in Pennsylvania in 1860 was $398,600,000, and in Virginia, $120,000,000. Thus, as a question of the annual yield of capital, that of Pennsylvania was 28.13 per cent., and of Virginia, 15.13 per cent. By Census Table 35, the total value of the real and personal property of Pennsylvania was $722,486,120 in 1850, and $1,416,501,818 in 1860, showing an increase, in that decade, of $694,015,698, being 96.05 per cent.; and in Virginia, $430,701,082 in 1850, and $793,249,681 in 1860, showing an increase of $362,548,599, or 84.17 per cent.

By Table 36, p. 196, Census of 1860, the cash value of the farms of Virginia was $371,092,211, being $11.91 per acre; and of Pennsylvania, $662,050,707, being $38.91 per acre. Now, by this table, the number of acres embraced in these farms of Pennsylvania was 17,012,153 acres, and in Virginia, 31,014,950; the difference of value per acre being $27, or largely more than three to one in favor of Pennsylvania, Now, if we multiply the farm lands of Virginia by the Pennsylvania value per acre, it would make the total value of the farm lands of Virginia $1,204,791,804; and the additional value, caused by emancipation, $835,699,593, which is more, by $688,440,093, than the value of all the slaves of Virginia. But the whole area of Virginia is 39,265,280 acres, deducting from which the farm lands, there remain unoccupied 8,250,330 acres. Now, if (as would be in the absence of slavery,) the population per square mile of Virginia equalled that of Pennsylvania, three fifths of these lands would have been occupied as farms, viz., 4,950,198, which, at the Pennsylvania value per acre, would have been worth $188,207,524. Deduct from this their present average value of $2 per acre, $9,800,396, and the remainder, $178,407,128, is the sum by which the unoccupied lands of Virginia, converted into farms, would have been increased in value by emancipation. Add this to the enhanced value of their present farms, and the result is $1,014,106,721 as the gain, on this basis, of Virginia in the value of her lands, by emancipation. To these we should add the increased value of town and city lots and improvements, and of personal property, and, with emancipation, Virginia would now have an augmented wealth of at least one billion and a half of dollars.

The earnings of commerce are not given in the Census Tables, which would vastly increase the difference in the value of their annual products in favor of Pennsylvania as compared with Virginia. These earnings include all not embraced under the heads of agriculture, manufactures, the mines, and fisheries. Let us examine some of these statistics.

Railroads.—The number of miles of railroads in operation in Pennsylvania in 1860, including city roads, was 2,690.49 miles, costing $147,283,410; and in Virginia, 1,771 miles, costing $64,958,807. (Census Table of 1860, No. 38, pp. 230, 232.) The annual value of the freight carried on these roads is estimated at $200,000,000 more in Pennsylvania than in Virginia, and the passenger account would still more increase the disparity.

Canals.—The number of miles of canals in Pennsylvania in 1860 was 1,259, and their cost, $42,015,000. In Virginia the number of miles was 178, and the cost, $7,817,000. (Census Table 39, p. 238.) The estimated value of the freight on the Pennsylvania canals is ten times that of the freight on the Virginia canals.

Tonnage.—The tonnage of vessels built in Pennsylvania in 1860 was 21,615 tons, and in Virginia, 4,372. (Census, p. 107.)

Banks.—The number of banks in Pennsylvania in 1860 was 90; capital, $25,565,582; loans, $50,327,127; specie, $8,378,474; circulation, 13,132,892; deposits, $26,167,143:—and in Virginia the number was 65; capital, $16,005,156; loans, $24,975,792; specie, $2,943,652; circulation, $9,812,197; deposits, $7,729,652. (Census Table 35, p. 193.)

Exports and Imports, etc.—Our exports abroad from Pennsylvania, for the fiscal year ending 30th June, 1860, and foreign imports, were of the value of $20,262,608. The clearances, same year, from Pennsylvania, and entries were 336,848 tons. In Virginia the exports the same year, and foreign imports were of the value of $7,184,273; clearances and entries, 178,143 tons, (Table 14, Register of U.S. Treasury.) Revenue from customs, same year, in Pennsylvania, $2,552,924, and in Virginia, $189,816; or more than twelve to one in favor of Pennsylvania. (Tables U.S. Commissioner of Customs.) No returns are given for the coastwise and internal trade of either State; but the railway and canal transportation of both States shows a difference of ten to one in favor of Pennsylvania. And yet, Virginia, as we have seen, had much greater natural advantages than Pennsylvania for commerce, foreign and internal, her shore line up to head of tide-water being 1,571 miles, and Pennsylvania only 60 miles.

We have seen that, exclusive of commerce, the products of Pennsylvania in 1860 were of the value of $398,600,000, or $137 per capita; and in Virginia, $120,000,000, or $75 per capita. But, if we add the earnings of commerce, the products of Pennsylvania must have exceeded those of Virginia much more than four to one, and have reached, per capita, nearly three to one. What but slavery could have produced such amazing results? Indeed, when we see the same effects in all the Free States as compared with all the Slave States, and in any of the Slave States, as compared with any of the Free States, the uniformity of results establishes the law beyond all controversy, that slavery retards immensely the progress of wealth and population.

That the Tariff has produced none of these results, is shown by the fact that the agriculture and commerce of Pennsylvania vastly exceed those of Virginia, and yet these are the interests supposed to be most injuriously affected by high tariffs. But there is still more conclusive proof. The year 1824 was the commencement of the era of high tariffs, and yet, from 1790 to 1820, as proved by the Census, the percentage of increase of Pennsylvania over Virginia was greater than from 1820 to 1860. Thus, by Table 1 of the Census, p. 124, the increase of population in Virginia was as follows:

The increase of population in Pennsylvania was:

In 1790 the population of Virginia was 748,318; in 1820, 1,065,129, and in 1860, 1,596,318. In 1790 the population of Pennsylvania was 434,373; in 1820, 1,348,233, and in 1860, 2,906,115. Thus, from 1790 to 1820, before the inauguration of the protective policy, the relative increase of the population of Pennsylvania, as compared with Virginia, was very far greater than from 1820 to 1860. It is quite clear, then, that the tariff had no influence in depressing the progress of Virginia as compared with Pennsylvania.

Having shown how much the material progress of Virginia has been retarded by slavery, let us now consider its effect upon her moral and intellectual development.

Newspapers and Periodicals.—The number of newspapers and periodicals in Pennsylvania in 1860 was 367, of which 277 were political, 43 religious, 25 literary, 22 miscellaneous; and the total number of copies circulated in 1860 was 116,094,480. (Census Tables, Nos. 15, 37.) The number in Virginia was 139, of which 117 were political, 13 religious, 3 literary, 6 miscellaneous; and the number of copies circulated in 1860 was 26,772,568, being much less than one fourth that of Pennsylvania. The number of copies of monthly periodicals circulated in Pennsylvania in 1860 was 464,684; and in Virginia, 43,900; or much more than ten to one in favor of Pennsylvania.

As regards schools, colleges, academies, libraries, and churches, I must take the Census of 1850, those tables for 1860 not being yet arranged or printed. The number of public schools in Pennsylvania in 1850 was 9,061; teachers, 10,024; pupils, 413,706; colleges, academies, &c., pupils, 26,142; attending school during the year, as returned by families, 504,610; native adults of the State who cannot read or write, 51,283; public libraries, 393; volumes, 363,400; value of churches, $11,853,291; percentage of native free, population (adults) who cannot read or write, 4.56. (Comp. Census of 1850.)

The number of public schools in Virginia in 1850 was 2,937; teachers, 3,005; pupils, 67,438; colleges, academies, &c., pupils, 10,326; attending school, as returned by families, 109,775; native white adults of the State who cannot read or write, 75,868; public libraries, 54; volumes, 88,462; value of churches, $2,902,220; percentage of native free adults of Virginia who cannot read or write, 19.90. (Comp. Census of 1850.) Thus, the church and educational statistics of Pennsylvania, and especially of free adults who cannot read or write, is as five to one nearly in favor of Pennsylvania. When we recollect that nearly one third of the population of Pennsylvania are of the great German race, and speak the noble German language, to which they are greatly attached, and hence the difficulty of introducing common English public schools in the State, the advantage, in this respect, of Pennsylvania over Virginia is most extraordinary.

These official statistics enable me, then, again to say that slavery is hostile to the progress of wealth and education, to science and literature, to schools, colleges, and universities, to books and libraries, to churches and religion, to the PRESS, and therefore to FREE GOVERNMENT; hostile to the poor, keeping them in want and ignorance; hostile to LABOR, reducing it to servitude and decreasing two thirds the value of its products; hostile to morals, repudiating among slaves the marital and parental condition, classifying them by law as CHATTELS, darkening the immortal soul, and making it a crime to teach millions of human beings to read or write.

And yet, there are desperate leaders of the Peace party of Pennsylvania, desecrating the name of Democrats, but, in fact, Tories and traitors, who would separate that glorious old commonwealth from the North, and bid her sue in abject humiliation for admission as one of the Slave States of the rebel confederacy. Shades of Penn and Franklin, and of the thousands of martyred patriots of Pennsylvania who have fallen in defence of the Union from 1776 to 1863, forbid the terrible degradation.