The ill-fated mountaineer George Mallory's only book was "Boswell the Biographer"?
Denis-Daniel de FromentDied 1810
Life with Boswell:
Boswell first met Froment, the husband of his travelling companion from Utrecht to Berlin, Emet-Ulla, in Berlin on July 5, 1764. He described him as "a lively Frenchman, pretty much mellowed.". Boswell and Froment stayed within a short distance of each other during Boswell's Berlin stay, and they often dined together.
Main source for the biography is The Journal of his German and Swiss Travels, 1764.