Callander presented five volumes of manuscripts,
Spicilegia Antiquitatis Græcæ, sive ex veteribus Poetis deperdita Fragmenta, to the
Society of Scottish Antiquaries in 1781, shortly after he was elected a fellow. He also presented at the same time nine volumes of manuscript annotations on
John Milton's
Paradise Lost, of which he had published those on Book I. in 1750. In March 1818 an article on the edition of Book I. of appeared in ''
Blackwood's Magazine, in which it was shown that much in his notes had been borrowed without acknowledgment from the annotations of Patrick Hume in the sixth edition of Paradise Lost'' (published by
Jacob Tonson) in 1695. A committee of the Society of Antiquaries of Scotland reported on the manuscript notes, saying that a comparatively small proportion of were from Hume. was an influential work for British readers, and timely given the expeditions of
James Cook, the content involved adaptation without acknowledgement of the work and maps of de Brosses, and is considered as
plagiarism. In 1779 Callander published
An Essay towards a Literal English Version of the New Testament in the Epistle of Paul directed to the Ephesians, in which he gave a
metaphrase in English of the Greek idiom. His edition of ''Two ancient Scottish Poems, the Gaberlunzie Man, and
Christ's Kirk on the Green, with Notes and Observations'', published at Edinburgh in 1782, contained questionable etymological remarks. Callander projected other works, including
Bibliotheca Septentrionalis, of which he printed a specimen in 1778, and a
History of the Ancient Music of Scotland from the age of the venerable Ossian to the beginning of the Sixteenth Century, for which he printed
Proposals in 1781. ==Family==