Abstract The Gary J. Neeleman photograph collection consists of photographs collected by Neeleman for inclusion in his 2014 book Tracks in the Amazon: The Day-to-Day Life of the Workers on the Madeira-Mamoré Railroad. The collection contains and album and loose prints taken primarily by Dana B. Merrill, who was contracted as the official photographer to document the construction of the Madeira-Mamoré Railroad along the Madeira River in the Amazon between 1907 and 1912.