I recently was able to acquire an article reprint from the October 1889 Volume I, Number 4 issue of the National Geographic Magazine. Roger Nathan lists this as being the third article reprinted, with two articles from the July 1889 Volume I, Number 3 being numbers one and two.
The article is entitled "Across Nicaragua with Transit and Machete" and was written by R. E. Peary, Civil Engineer with the U.S. Navy. This is the same man who, as an Admiral, would reach the North Pole on an expedition funded by the Society in 1909.
The article does include the foldout map of Nicaragua:
Photo Courtesy of Philip Rivere
Since currently I possess no original Red Brick issues, this item is the oldest piece in my collection.
Yours in Collecting,