Fought, more or less, in the sad remainder of that Cumberland-Saxe War; and after the Peace of 1748 continued in the Dutch service.

Where, loath to be idle, he got his learned Books out again, and took to studying thoroughly the Ancient Art of War.

After years of this, it had grown so hopeful that he proceeded to a Book upon it; and, by degrees, determined that he must get to certain Libraries in England, before finishing.

In 1754, on furlough, graciously allowed and continued, he came to London accordingly; finished his manuscript there (printed at the Hague 1757 [_Memoires Militaires sur les &c._ (a La Haye, 1757: 2 vols.

4to);--was in the 5th edition when I last heard of it.]): and new War having now begun, went over (probably with English introductions) as volunteer to Duke Ferdinand.