Samuel Gaudie and the 5th Infantry Battalion landed at Gallipoli on day one. Gaudie remained there until he returned to Lemnos in October 1915 though the reason is not clear from the records. The troops were quite debilitated by exposure and disease by that time, and many were evacuated for a rest, or to recover from disease. Sam seems to have decided he liked it on Lemnos, and disappeared. He may have found someone to shelter him in the Greek village of Castro on the island, which would have been delightfully human after the horrors of Gallipoli. He probably just didn't want to return. It set a pattern for the next few years. You can
read the story of Sam's misadventures, as told by Rod Martin.