After war career: In 1784 formed a partnership with Robert Morris in Baltimore called Tench Tilghman & Co. Lived on Lombard Street.https://msa.maryland.gov/megafile/msa/speccol/sc3500/sc3520/002600/002633/html/02633bio.html
Tilghman was an original member of the Maryland Society of the Cincinnati; Morris, an honorary member of the Pennsylvania society.
Society of the Cincinnati and Old China Trade
http://www.chinadaily.com.cn/a/201812/14/WS5c13d13aa3107d4c3a000ece.html