At Syene there is a well which indicates the summer solstice, because these places lie under the tropical circle,[887] [and occasions the gnomons to cast no shadows at mid-day].[888] For on proceeding from the places in our country, in Greece I mean, towards the south, the sun is there first over our head, and occasions the gnomons to be without shadows at noon. When the sun is vertical to us, it must necessarily cast its rays down wells, however deep they may be, to the water. For we ourselves stand in a perpendicular position, and wells are dug perpendicular to the surface. Here are stationed three Roman cohorts as a guard. 49. A little above Elephantine is the lesser cataract, where the boatmen exhibit a sort of spectacle to the governors. The cataract is in the middle of the river, and is formed by a ridge of rock, the upper part [or commencement] of which is level, and thus capable of receiving the river, but terminating in a precipice, where the water dashes down. On each side towards the land there is a stream, up which is the chief ascent for vessels. The boatmen sail up by this stream, and, dropping down to the cataract, are impelled with the boat to the precipice, the crew and the boats escaping unhurt. A little above the cataract is Philæ, a common settlement, like Elephantina, of Ethiopians and Egyptians, and equal in size, containing Egyptian temples, where a bird, which they call hierax, (the hawk,) is worshipped; but it did not appear to me to resemble in the least the hawks of our country nor of Egypt, for it was larger, and very different in the marks of its plumage. They said that the bird was Ethiopian, and is brought from Ethiopia when its predecessor dies, or before its death. The one shown to us when we were there was sick and nearly dead. 50. We came from Syene to Philæ in a waggon, through a very flat country, a distance of about 100 stadia.[889] Along the whole road on each side we could see, in many places, very high rocks, round, very smooth, and nearly spherical, of black hard stone, of which mortars are made: each rested upon a greater stone, and upon this another: they were like hermæa.[890] Sometimes these stones consisted of one mass. The largest was not less than twelve feet in diameter, and all of them exceeded this size by one half. We crossed over to the island in a pacton, which is a small boat made of rods, [CAS. 818] whence it resembles woven-work. Standing then in the water, (at the bottom of the boat,) or sitting upon some little planks, we easily crossed over, with some alarm indeed, but without good cause for it, as there is no danger if the boat is not overloaded.