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Charles Frederick Wiesenthal meivtion.s him in a letter to his son, Andrew, then pursuing his medical studies in London. AfttT urging; him to seek to acquire skill in surgical operations, especially in lithot- omy and extraction of cataract, he says: "There is a young man returned lately, Mr. Tvler, who is settled in Frederick and

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has successfully couched two or three persons, which has at once made him very conspicuous and he has made a con- siderable good match on the strength of it (June 5, 1787)." E. F. C.

Hist, of Western Maryland, ScarfF.

Toner's Ms. Biographies, Nat. Lib., Wash.,

]). C.