Comprehensive lot including a 15x17" twice-folded brochure heavily photo illus including descriptions and pictures of the Kari-Keen Cabin, Barling Monoplane, Lincoln P.T. and Travel Air Transport. Unfolded it becomes a wonderful display piece worthy of framing. Included are four letters and original mailing envelopes to the same individual encouraging enrollment in courses (encouragement is mild, this was heavy pressure!). Very good condition.