Vandal, vol. i., p. 384.
Metternich, "Mems.," vol. ii. p. 298 (Eng. edit.).
I think that Beer (pp. 330-340) errs somewhat in ranking Talleyrand's work at Erfurt at that statesman's own very high valuation, which he enhanced in later years: see Greville's "Mems.," Second Part, vol. ii., p. 193.