To understand the significance of McQueen’s work, one must first understand the historical context. In the late 1920s and 1930s, airmail was not a door-to-door service. It was a hybrid transport system, especially across the French colonial empire and into South America.
Before reliable trans-Atlantic flight, mail was often flown to New York ("Jusqu’à New York") and then sent by rail across the US or by ship to South America. War-Time Disruptions: Jusqu-a Airmail Markings- A Study Ian McQueen
Jusqu’à Airmail Markings (A Study) by Ian McQueen is a seminal philatelic reference work that explores the specialized field of "jusqu'à" (French for "as far as") markings. These postal handstamps indicate that a piece of mail was carried by air only for a portion of its journey, after which it was transferred to surface transport for final delivery . Publication History and Editions To understand the significance of McQueen’s work, one