In 1860 he was made quartermaster-general, with the rank of brigadiergeneral.
The pay of his rank was small, and his appointment on the quartermaster-general's staff made it necessary to keep two horses, so that he had to write mathematical school-books in his spare time to eke out his resources.
Wilkinson then resigned (March 1778) his newly-acquired commission, but later re-entered the service in the quartermaster, He died in London on the 19th of general's department, and was clothier-general from July 1779 to March 1781.
After the Mexican war he served in the West, in Florida and elsewhere; was married in 1850 to Miss Almira Russell of St Louis; became first lieutenant in 1853, and assistant-quartermaster with the rank of captain in 1855.
Gneisenau apparently selected Wavre, not with the intention of assisting his ally, but rather to re-establish his own line of communication, and the presence of the Prussians on the field of battle of Waterloo must be put down to the immortal credit of Blucher and Grolmann, his quartermaster-general.