Between what years did the author of Solip:System write under the name Jon Williams?
Solip:System: Solip:System is a 1989 cyberpunk science fiction novelette by Walter Jon Williams. Walter Jon Williams:  Previously he wrote nautical adventure fiction under the name Jon Williams, a series of historical novels set during the age of sail, Privateers and Gentlemen (1981–1984).
1981–1984