Statistics for occurrence #1 of “Lieutenant-colonel M. R. Morgan” in chapter 16 of General Horace Porter, Campaigning with Grant:

...mates at West Point, and were on terms of extreme intimacy. Ingalls was exceedingly popular in the army, and both officially and personally was regarded as an important acquisition to the staff. Lieutenant-colonel M. R. Morgan , an efficient and experienced officer of the commissary department, was added to the staff of the general-in-chief as chief commissary; thirty years after he became commissary-general of the army. ...
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