The contents are as follows.
(i) 'Of the principles of all science and demonstrative reasoning, and of the nature of the divine mind', 1777. (Folio 1.) Monboddo number 51.
(ii) 'Speculations upon the original residence of Man', written while suffering from a fever, 1778. (Folio 23.) Monboddo number 169.
(iii) Metaphysical papers on the Human mind and the difference between physical sensation and intellect, 1775, I778, undated. (Folio 24.) Monboddo numbers 10, 22, 17, 16.