Campbell married physician Florence Gertrude (born 1866, daughter of John William Longbottom and his second wife Elizabeth) of Halifax on 29 August 1891.Halifax Guardian Birth, Marriage & Death Notices Together they worked in India but exposure to patients led to him contracting tuberculosis and he returned to England to convalesce. Treated by his wife, he recovered and they returned to India to establish the Ralph Wardlaw Thompson memorial hospital in Chikkaballapura. Wardlaw Thompson (1842-1916) was a Bellary-born missionary who had served as the foreign secretary of the London Missionary Society from 1881 to 1914. Campbell's wife worked on the health of women while his work included the treatment of nearly a thousand cases of cataract. In 1908 he was awarded the Kaisar-i-Hind medal for his services to public health. He also proposed the establishment of sanatoria for the treatment of tuberculosis and this resulted in the founding of several including the Madanapalle TB sanatorium. After his retirement, he settled in Edinburgh where he joined the Royal Physical Society of Edinburgh in 1919 serving as its treasurer from 1922 until his death.
