I have no idea. But Amelia Edwards claimed it was nearly that in her travelogue A Thousand Miles Up the Nile. Published in the 1870s, this firsthand account of traveling the Nile by dahabiyah tops the list of irreplaceable research material that I'm devouring while writing my historical novel. 

I finally thought to add it to my Goodreads bookshelf. The review I posted there is as follows: