I am looking for photographs, including aerial, of the sites of Alexander's main battles; Gaugamela, Issus, Granicus and the Hydaspes; and any reports on any archaeological surveys of the sites. Have seen a number of pictures of the Granicus (NGL Hammond, NT Nikolitsis,Michael Thompson) mostly black and white but some colour, but do not find them particularly helpful. Geologogical surveys regarding changes to the watercourse would also be of help. Any suggestions or contacts?