During a trip to the United Kingdom in the spring of 1872, Moody became well known as an evangelist. Literary works published by the Moody Bible Institute claim that he was the greatest evangelist of the 19th century. On several occasions, he filled stadia of a capacity of 2,000 to 4,000. According to his memoir, in the Botanic Gardens Palace, he attracted an audience estimated at between 15,000 and 30,000.
That turnout continued throughout 1874 and 1875, with crowds of thousands at all of his meetings. During his visit to Scotland, Moody was helped and encouraged by Andrew A. Bonar.