1867] · [Washington, D.C.
Patent granted to William M. Henderson of Philadelphia for "improvements in the mode of constructing and operating direct-action independent steam engines." F.  is the patent itself on an engraved form, with the hand signature of acting Secretary of the Interior W.I. Otto; f.  is a drawing, with some coloring in blue and red, of the device as improved upon, and f.  is Henderson's official description of it. Laced together with a silk ribbon. Some browning, especially adjacent to ribbon and wafer; and a few tiny tears in edges. Short closed tears along the folds, without loss. (Inventory #: 8635)