The surviving manuscript of the instructional work A Manual of Religious Belief is written in the form of a theological dialogue between father and child written out in holograph by John Murdoch for William Burnes, Robert Burns's father. William had started to compose and compile the work before Robert Burns's birth and wrote the first rough draft that has not survived. This work was originally composed with a stronger Scots language content that Murdoch modified, as well as making grammatical corrections.

John Murdoch of Ayr was Robert Burns's most significant teacher or tutor and he was a friend of the Burnes family. He was born in 1747 and first taught Gilbert and Robert Burns in Alloway when he was only aged eighteen. He remained in contact with the Burnes family for several years after leaving Ayrshire for London. Murdoch, William Burnes and Richard Brown were amongst the most significant influences on Burns life during his early years in Ayrshire.