'Trigonomctria Planorum, Geometria practica. & Trigonometria Sphaæricorum, conscriptæ in usum Juventutis Academiæ Edinburgcnæ a Davide Gregorio in eadem Academia Matheseos Professore, Anno Domino [sic] 1686.' The second part was copied in Nov. 1710 (see pp. 76a, i), so the volume is not in Gregory's own hand.