Graham was born in a religious family on 8 September 1861 at
De Beauvoir, West Hackney district,
London, to the Scottish father from
Dunbartonshire David Graham, a customs officer, and the
Irish mother Bridget Nolan, a homemaker. He attended local
Parish school, and was withdrawn from the school at the age of thirteen to work in order to support the family as his father had died in 1867. With minimum and interrupted schooling, he started working as a clerk in a role of
licking stamps and delivering messages. With an appetite to continue further studies, he attended evening classes at
The Andersonian where he studied
stenography and
astronomy. In 1875, he enrolled himself in a school at
Glasgow. At the age of sixteen, he worked as a minor civil servant (clerk) to the General Board of Lunacy,
Edinburgh. During this period, he became engaged in Church affairs as a member of St. Bernard's Parish Church, and also became the secretary of the ''Young Men's Fellowship Association
. From University of Edinburgh, he studied ministry in 1885. While studying at the university, he became the secretary to the committee producing Life and Work
, a Church periodical, and also learnt here the importance and power of propaganda and dissemination of information. In 1886, he initiated the Church of Scotland Yearbook'', and went to
Dresden,
Germany, for a brief period of study. With
British Empire colonialism expanding globally and reaping financial benefits many missionary committees and ministers, doctors and nurses received the call to serve in faraway places that also included a duty to free the
natives from the superstitions and fears of the religions that they had feared for centuries. Accordingly, he became the national secretary for the "Young Men's Guild," and was ordained as the first missionary supported by the same guild on 13 January 1889. After two days of ordination, he married Katherine McConachie, who later bore him two sons and four daughters, and was sent as a missionary to
Kalimpong, part of then-British Sikkim—till the 18th century, it had been part of
Sikkim, then became part of
Bhutan, and at present part of West Bengal from the 19th century. Graham and his wife arrived
Calcutta on 21 March 1889 travelling via
Switzerland,
Austria, and
Italy. From Calcutta, they moved to
Darjeeling, and then to Kalimpong—then populated with three main tribes
Lepchas,
Nepalese, and
Bhutias - Graham was more attracted later to work with original inhabitants of the area, Lepcha people. ==Missionary work==