And as to this, it is recounted that the inhabitants of the city of Caesarea,[BB] which is in that same land of Mauritania, took a crocodile[N150] and put it in one of their temples called Eseo; and that for many years it remained there in testimony that the said crocodiles were to be found in that pool; and he relateth that it was found by some men of that land who examined the matter, and found it well proved that, according as it snowed and rained in the land of Mauritania, where that fountain is, in like manner rose or fell the Nile itself. And that after it issueth from that part and reacheth the land of the sands, it will not run over the surface of those sands nor through places altogether desert or miserable, but that it vanisheth there, and so floweth hidden beneath the sand for the space of many days. And they say, too, that after it arriveth at the other Mauritania Caesariensis, which is not a sandy land, it cometh up over the ground and there maketh another lake, in the which breed those same animals and creatures which breed in the other; and therefore men believe that all this water cometh from the Nile, and that after it floweth out from there and cometh to the other sandy districts which are beyond Mauritania and towards Ethiopia, it again disappeareth and runneth for the space of twenty days underground till it is within the land of Ethiopia. And here again it cometh up above the ground, showing clearly that it riseth from a fountain like that other in Mauritania, which is called Nigris, where also breed the same animals and other things that we have described before. [Footnote BB: Cherchel.]