He held the seat until the 1915 election when he was defeated by the Labor candidate Harry Ryan.

[2] On 28 April 1910, Henry Douglas married Flora Isabel MacDonald at the St Stephen's Catholic Cathedral in Brisbane.

[4][5] However, she died unexpectedly six months later on 7 December at their home in Kangaroo Point following a minor illness.

[6][7] On 11 February 1914, he married Catherine Cecilia Beirne, daughter of Thomas Beirne (a wealthy businessman and Member of the Queensland Legislative Council) at St Stephen's Cathedral in Brisbane; Joseph Shiel ( Bishop of Rockhampton) officiated.

[2] He was buried on 1 September 1952 at the Nudgee cemetery following a funeral service at St Agatha's Roman Catholic Church at Clayfield.