I'm sure that someone has seen this already but I figured I would post it anyways.
http://www.fordham.edu/halsall/ancient/arabia1.html
It gives accounts of "Arabia" from Herodotus, Strabo, Dio Cassius, Ammianus Marcellinus and Procopius. Though the accuracy should no doubt be in question it maybe of some interest to anyone working on Sab'yn.