 While at Boscastle, Rundle took an interest in the Wesleyan Church affairs there.Eventually Rundle joined the Wesleyan Church in a more active role; he undertook several months of missionary training, and was ordained on 8 March 1840, in London after being approved for a missionary assignment in Rupert's Land.In 1840, the Hudson's Bay Company reached a deal with the Wesleyan Missionary Society that several Methodist missionaries would be dispatched to the western districts of Rupert's Land.