Statistics for occurrence #1 of “Baron Ashburton” in entry ashburton-alexander-baring-lord of Harper's Encyclopedia of United States History:

...se; in 1812-35 sat in Parliament, and in 1835 was raised to the peerage under the title of Baron Ashburton. The unsettled condition of the Northeastern boundary question led Sir Robert Peel to send Baron Ashburton to the United States, as being widely acquainted with American affairs. Here he concluded, Aug. 9, 1842, with Daniel Webster, the Webster-Ashburton treaty, which settled the northeastern boundary ...
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