In printing this second edition of my little guide-book, I think it will be found interesting and necessary to leave all the former evidence and opinions that I collected as to the date of Stonehenge. Since the excavations in 1901, I think we may consider the age of Stonehenge to be between three and four thousand years. Mr. W. Gowland judges from the implements or tools found, Sir Norman Lockyer and Dr. Penrose from astronomical observations, based on the fact that the avenue (“Vi Sacra”) to Stonehenge from the east of the ancients was in a line with the Altar Stone, so that the sun, rising on the day of the solar half-year (June 21st) and creeping over the horizon, shed his beams on the Altar Stone, thus marking the solar half-year. Of course, the east of the ancients is not our east, but the difference between the position of the sun now and then to the avenue gives, according to these gentlemen’s calculations, a date of 3700 years old to Stonehenge.