Robert's tutor was
David Bogue of
Gosport. After reading about the start of the
French Revolution he grew to disapprove strongly of the war with France. Robert resolved to devote himself to advancing
Christianity. Robert became one of the first members of the
London Missionary Society in 1795, the same year that he was converted. He offered the
British Government and the
East India Company to sell Airthrey Estate in order to set up a vast mission in
Bengal but was turned down by the East India Company, and the mission was abandoned. for congregations, in supporting missionaries, and in maintaining institutions for the education of young men to carry on the work of evangelization. In 1798 he sold the Airthrey Estate to
Robert Abercromby to obtain funding for his mission work and with the funds raised to set up the
Society for Propagating the Gospel at Home in Edinburgh. Over the next twelve years (1798–1810) he gave over £70,000; this was used to further the cause of the Society for Propagating the Gospel at Home by building chapels for congregations, supporting missionaries and helping to maintain institutions for young men to be educated to carry on the work of evangelization. Robert was inspired by
George Whitefield's two tabernacles in London and built preaching centres strategically placed throughout Scotland. These tabernacles were located in
Glasgow,
Dundee,
Perth,
Thurso,
Wick, Edinburgh and
Elgin. His brother James took over the Edinburgh tabernacle until 1851. Robert funded
John Campbell's
Society for the Education of Africans which initially planned to evangelise in Africa by bringing over native children to be trained as Christian missionaries in Edinburgh. However, owing to an outbreak of
smallpox, the group of children remained in the London area at what became known as the
African Academy in
Clapham. From 1799 to 1807, Robert set up theological seminars in Glasgow, Edinburgh and Dundee to train young men with a passion for the gospel. Young men would come and train for 2–3 years with all their expenses paid for. Over this time 300 men were trained and sent out to spread their teachings all over the world. In 1816 Robert published a work on the
Evidences and Authority of Divine Revelation. In the summer of 1816 Robert Haldane visited Europe, first at
Geneva and afterwards in
Montauban. He lectured and interviewed large numbers of theological students with remarkable effect; among them were
César Malan,
Frédéric Monod and
Jean-Henri Merle d'Aubigné. This circle of men spread the revival of evangelical Protestant Christianity across the continent of Europe (
Le Réveil), impacting France, Germany (Die Erweckung) and the Netherlands (Het Reveil). Through conversion and missionary impetus the effects of this revival were felt as far afield as
Italy and
Hungary. == Later life ==