Statistics for occurrence #1 of “Dr. Fordyce Barker” in chapter 49 of Adam Badeau, Grant in peace: from Appomattox to Mount McGregor, a personal memoir:

...o New York. But General Grant never nursed himself, and it was nearly a month before he acted on the advice. His pains finally became so frequent and so acute that Mrs. Grant persuaded him to see Dr. Fordyce Barker , who instantly said if the case were his own or that of one of his family, he should consult Dr. J. H. Douglas; and General Grant went the same day to Dr. Douglas. This was on the 22d of October. ...
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