He is thought to be the son of Richard Cowan WS an Edinburgh lawyer working at Drummond Place in the 1820s.
In 1830 he is operating as an advocate from 30 Drummond Place (possibly his father's office) and from 1840 at 2 North Charlotte Street off Charlotte Square in Edinburgh.
At this stage he lived at 4 Ainslie Place on the prestigious Moray Estate in western Edinburgh.
[1] In later life he lived at Elmbank on Whitehouse Loan in south Edinburgh.
He is buried with his family in "Lords Row" on the western wall of Dean Cemetery.