The volumes contain copies of the Moray House Tests (M.H.T.), the Moray House English Tests (M.H.E.), and the Moray House Arithmetic Tests (M.H.A.). They also contain correspondence between Thomson and various Education Authorities in England regarding the administering and scoring of the tests; reports regarding the administration, grading, and results of tests; graphs of the results (including graphs plotting children's age against their score, and number of pupils against score obtained); ready reckoners allowing for the conversion of test scores to IQ; answer keys; notes regarding the administration of tests; and notes regarding the history of tests – i.e., where they were trialled and the results of this.