[6] The Persian princes go more into detail; but we doubt whether their description will much facilitate the construction of a railway from Ispahan to Shiraz.  “The roads on which the coaches are placed and fixed, are made of iron bars; all that seems to draw them is a box of iron, in which they put water to boil; underneath, this iron box is like an urn, and from it rises the steam which gives the wonderful force; when the steam rises up, the wheels take their motion, the coach spreads its wings, and the travellers become like birds.”

Astley’s (which the Persian princes call the “opera of the horse”) was the Khan’s next resort; and as the feats of horsemanship there exhibited did not require any great proficiency in the English language to render them intelligible, he appears to have been highly amused and gratified, and gives a long description of all he saw there, which would not present much of novelty to our readers.  He was also taken by some of his acquaintance to see the industrious fleas in the Strand; but this exhibition, which accorded unbounded gratification to the grandsons of Futteh Ali Shah, seems to have been looked upon by the khan rather with contempt, as a marvellous piece of absurdity.  “Would any one believe that such a sight as this could possibly be witnessed any where in the world? but, having personally seen it, I cannot altogether pass it over.”  But the then unfinished Thames Tunnel, which he had the advantage of visiting in company with Mr Brunel, appears to have impressed his mind more than any other public work which he had seen; and his remarks upon it show, that he was at pains to make himself accurately acquainted with the nature and extent of the undertaking, the details of which he gives with great exactness.  “But,” he concludes, “it is impossible to convey in words an adequate idea of the labour that must have been spent upon this work, the like of which was never before attempted in any country.  The emperors of Hindustan, who were monarchs of so many extensive provinces, and possessed such unlimited power and countless treasures, desired a bridge to be thrown across the Jumna to connect Delhi with the city of Shahdarah—­yet an architect could not be found in all India who could carry this design into execution.  Yet here a few merchants formed a company, and have executed a work infinitely transcending that of the most elaborate bridge ever built.  In the first instance, as I was given to understand, they applied to Government for leave to construct a bridge at the same spot, but as it was objected that this would impede the navigation of the river, they formed the design, at the suggestion of the talented engineer above mentioned, of actually making their way across the river underground, and commenced this great work in spite of the general opinion of the improbability of success."[7]