 Complete the following phrase:  Callcott published in 1836 an abridgement of his fathers Musical Grammar, in 1840 a collection of psalm and hymn tunes for Edward Bickersteths Christian Psalmody, and in 1843 The Childs own Singing Book. In the latter work he was assisted by his wife Maria, who was the author of religious stories. In 1851 he published Remarks on the Royal Albert Piano exhibited at the 