Nelson Pratt went on Collin Expediton to South America

Nelson Pratt joined the Collins expedition to Brazil from Williamsport January 1878
Collins expedition to Brazil in 1878, to build the Madeira & Mamoré Railway


 


 I think he might have been recruited by Robert Hepburn

Unpublished manuscript (65 typed pages) written about 1916 and documenting the authors experiences while working for the 1878 Collins Expedition in Brazil.
https://archive.org/details/MadeiraMamoreRailroad1878Manuscript/page/n11