The P-35A was an export version of the Army's standard P-35. A slightly bigger engine, another .50 caliber gun in each wing and a few other modifications. Although a little more manuverable than the P-40, they were no match for the Zero is several categories. The ones not shipped to the Philippines or Sweden were used as advanced trainers.
I mentioned there was a compartment that in a pinch, could hold a passenger. One of the surviving P-35s flew from Bataan to Cebu, which, at the time, was still held by the Americans. The officer meeting the plane was amazed to see no one but TWO passengers crawl out of the compartment - PLUS another person riding on the pilot's lap!! Talk about claustrophobia!!
Another interesting story was during the pre-war period. The 17th PS had a monkey as a mascot and one of the pilots (apparently not the one with the highest i.q.!) took the monkey on a flight with him. The monkey was NOT taken with flight and the pilot was lucky to land the plane!!