Upon his return to Sind, Burton at first applied himself sedulously to Sindi, and then, having conceived the idea of visiting Mecca, studied Moslem divinity, learnt much of the Koran by heart and made himself a "proficient at prayer." It would be unjust to regard this as mere acting. Truth to say, he was gradually becoming disillusioned. He was finding out in youth, or rather in early manhood, what it took Koheleth a lifetime to discover, namely, that "all is vanity." This being the state of his mind it is not surprising that he drifted into Sufism. He fasted, complied with the rules and performed all the exercises conscientiously. The idea of the height which he strove to attain, and the steps by which he mounted towards it, may be fathered from the Sufic poet Jami. Health, says Jami, is the best relish. A worshipper will never realise the pure love of the Lord unless he despises the whole world. Dalliance with women is a kind of mental derangement. Days are like pages in the book of life. You must record upon them only the best acts and memories.

In time, by dint of plain living, high thinking, and stifling generally the impulses of his nature, Burton became a Master Sufi, and all his life he sympathised with, and to some extent practised Sufism. Being prevented by the weakness of his eyes from continuing his survey work, he made a number of reports of the country and its people, which eventually drifted into print. Then came the stirring news that another campaign was imminent in Mooltan, his heart leaped with joy, and he begged to be allowed to accompany the force as interpreter. As he had passed examinations in six native languages and had studied others nobody was better qualified for the post or seemed to be more likely to get it.