This is a piece of “V-Mail,” which the US military used during WWII. Troops would write their letters on the forms, which were then checked by censors before being copied to film to reduce the weight for air transport. The military would print the film once it arrived in the US, producing miniaturized copies of the original letters.

From Lt. R.C. Bushland
3rd Med Lab
APO 503 San Francisco
May 26, 1944

Dear Doctor Dove:

Thanks a lot for your letter and Dr. Roarke’s publication which just arrived. Was happy to hear from you. Although I wear a soldier suit, it’s a Bureau man that’s inside the uniform and news from you folks is always eagerly received.

May 26, 1944

Have finished my lab work and have put on one small demonstration. Am impatiently waiting for the chance to go ahead on a bigger scale. I still have “itchy feet.” The repellents arrived but there are no mosquitoes to test them against. That’s another reason for my desire to travel.

Lt. Col. Philips arrived last month but moved around for three weeks after that, and has just now settled down here. He’s a very pleasant man to work with, it seems from the little I’ve been around him.

Best wishes to all and thanks for the materials.

Sincerely
Bushland