Statistics for occurrence #1 of “Mr.” in chapter 11 of L. P. Brockett, Women's work in the civil war: a record of heroism, patriotism and patience:

...off that day, and as many more the following day. Miss Wormeley was just closing up her contract when, in April, 1862, the Hospital Transport service was organized, principally by the efforts of Mr. Frederick Law Olmstead, the General Secretary of the Sanitary Commission. The sudden transfer of the scene of active war from the high grounds bordering the Potomac to a low and swampy region inter...
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