Soon he wanted to become a missionary and in 1801, he started learning Latin, Greek Hebrew as well as systematic theology and shorthand from the Rev. W. Laidler, a Presbyterian minister in Newcastle, but his parents were opposed to his new vocation. During this period, Robert often spent free time in the garden in quiet meditation and prayer. At work, the Bible or some other book such as Matthew Henry's "Commentary" was open before him while his hands were busy. He regularly attended church on Sundays, visited the sick with the "Friendless Poor and Sick Society", and in his spare time during the week instructed poor children. He shared his faith in Christ with another young apprentice and to a sailor, showing a deep concern for the conversion of friends and family.