William H. Mapes, long connected with the hydrographic
division, and of great usefulness as inspecting engineer, died
suddenly on the 15th of April, 1879, in his forty-fourth year.
He entered the service in 1857, and was employed ten years as
engineer on sea-going steamers engaged in hydrography. At intervals
he supervised the repairs of engines and vessels, and the construction
of all vessels assigned for the work of the survey, in the course
of the last ten years. For these duties Mr. Mapes was especially
qualified by intelligence, good judgment, native industry and
unvarying kindness towards all. This record is due to his memory;
his devotion to the interests of the service was entire, and
his business intercourse was marked by scrupulous integrity.
Report of the Superintendent of the Coast and Geodetic Survey
1879. P. 12.