Ultra-rare vintage blue fountain pen signature on a roughly 4x5-inch sheet of letterhead, dating to 1950. In fine condition, with a central vertical fold. Legendary director Robert Flaherty is considered the father of the documentary film, remembered for his 1922 classic Nanook of the North. Somewhat controversial for his style of weaving fictional elements into his narratives, he is nonetheless regarded as one of the most seminal figures in the history of 20th-Century cinema. This is just the second example we have ever encountered.