| 31. | He studied air mail stamps and postal history, and wrote extensively on the subject.
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| 32. | The " Maiden Detroit " entered Contract Air Mail service on February 15, 1926.
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| 33. | A special stamp was issued to commemorate the event, and air mail delivery was announced.
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| 34. | It is captured in boxes of yellowed air mail tucked into the quiet of closets.
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| 35. | The flying boats also carried out air mail deliveries.
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| 36. | The aircraft flew from Detroit to Cleveland with the first commercial transport of air mail.
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| 37. | His airmail business was in the middle of the Air Mail scandal of the 1930s.
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| 38. | Foulois served as Chief of the Air Corps during the Air Mail scandal of 1934.
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| 39. | He brought with him the first piece of air mail ever delivered to Fort Worth.
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| 40. | Lindbergh used his fame to promote air mail service.
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