The ill-fated mountaineer George Mallory's only book was "Boswell the Biographer"?
Jean Christophe Guillaume de Rham
A short-sighted German, who stayed at Utrecht at least in the spring of 1764.
Life with Boswell:
Boswell mentions Rham at least one time in his memos for the spring of 1764. On March 29 of that year, the English society in Utrecht, of which Boswell was a member, met at Rahm's. Rahm was also mentioned in an anecdote in Boswell's own Boswelliana - the anecdote was not included in the original publication (1874), but is in a footnote in Boswell in Holland for April 1.