The Sunday School Union had been set up on 13 July 1803[1] "to encourage teachers to communicate with each other, improve methods, and support the opening of new schools".
[2] Over the years local auxiliaries were set up in London and then around the country.
[2] The address of the Sunday School Union in the early years of the 20th century was 57 and 59 Ludgate Hill, London, E.C.
[3] The office of the National Sunday School Union was located at the same address in the late 1920s.
[6][7] The Canadian branch (the Sunday School Union Society of Canada) was established in Montreal in 1822.