Civil engineer who introduced the ‘freezing’ process of excavation in big building projects, and designed the foundation for the Empire Building in Manhattan. Choice original 2.25 x 4 carte-de-visite photo by Horton of Philadelphia, signed on the reverse in black ink, “Yours truly, Charles Sooysmith, R. P. I. Class 76, Troy N.Y. 1876, Maywood, Cook Co. Ills.” In fine condition, with a small pencil notation to reverse. RR Auction COA.
