The Spanish didn’t know what to think about Wayne because he didn’t do things like previous generals had. They were also wary of Clark. They said he was “an enterprising youth of extraordinary activity.”
From his staff level position Clark saw what Wayne was doing and why; he learned valuable lessons that served him well later during the Expedition to the Pacific; lessons of training, discipline, caring for the health of the men, establishing field camps and fortifications, etc., etc.
The last special mission Clark embarked upon for General Wayne was in 1795. Clark was a messenger from General Wayne to the Spanish fortifications near Memphis, Tennessee. His daily journal entries were considered “a masterpiece of deception by omission” as they gave every appearance of innocently recording miles traveled, river currents, islands, success of hunters, etc. (much like the material in his journal entries during the Expedition), but after his return to Wayne his final report was a detailed piece of spy work that included gun placements, ship numbers and types, exactly what the fort looked like on the inside and just about anything else a military commander would want to know about an enemy’s position. The report was accompanied by drawings and maps. This was all done from memory of what he saw as the Spanish commander gave Clark a tour of the fort.
Clark returned from this mission in November of 1795 and took up the routine garrison life. He met his newly assigned junior officer Meriwether Lewis. William Clark resigned his army commission in July of 1796 and returned to life with his family.