He was born at 5 Charlotte Street (off Charlotte Square) in Edinburgh on 17 March 1819 the son of William Douglas WS and Anna Brown. He studied Medicine at Edinburgh University graduating in 1840.
He retired in 1893 due to health problems but some winters spent in the south of France improved him.
He had a stroke in December 1907 and was again in poor health thereafter. He died of a cerebral thrombosis at home in Edinburgh on 10 March 1908. He is buried in Dean Cemetery with his family. The grave is marked by a large but simple monument and stands in the south-east section.
Family
His tombstone relates a sad family history.
He was married four times: firstly to the wealthy Susan Scott Moncrieff, who died childbirth in 1852 (the child died two days later). He secondly married Jessie MacKinnon (b. 1839) who died in 1871, shortly after childbirth. He then married Jessie Simpson Moir (1839-1881), daughter of Dr John Moir. They had a daughter, Anna Lorn Douglas (1875-1945) and a son, Allan Moir Douglas (1876-1931) but his wife died in 1881, ten days after the birth of their stillborn son. Finally he married Marjory Horsburgh (1830-1902).
His son Rev Prof Andrew Halliday Douglas (1864-1902) moved to Canada to teach Apologetics at Knox College, Toronto, but died young following the removal of his appendix. He is also buried in Dean Cemetery in front of his father's grave.[4]