Statistics for occurrence #1 of “Col. E. S. Alexander” in chapter 7 of Elias Nason, McClellan's Own Story: the war for the union, the soldiers who fought it, the civilians who directed it, and his relations to them.:

...ops the 15th and 50th N. Y. Volunteers, which comprised an unusual number of sailors and mechanics in their ranks. These were formed into an engineer brigade, and placed under the command, first of Col. E. S. Alexander , U. S. Corps of Engineers, and finally under that of Col. D. V. Woodbury, of the same corps. These regiments rendered good service as engineer troops, and at length became admirable pontoniers, as ...
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