"Grégoire de Saint-Vincent, a Jesuit, born in Bruges in 1584 and died in Ghent in 1667, discovered the expansion of lo…"

"Liber hic fere Lemmaticus est, quemadmodum & alter, qui de Circulorum variis proprietatibus tractat. Porrò quo magis …"

"Grégoire de Saint-Vincent, the most gifted pupil of Clavius... received a sound grounding in Greek mathematics and wa…"

"Grégoire... was primarily concerned to illustrate by reference to the ungula that volumetric integration could be red…"

"No one ever squared the circle with so much ability or (except for his principal object) with so much success."

"Grégoire de Saint-Vincent... was a Jesuit, taught mathematics in Rome and Prag (1629-1631), and was afterwards called…"

"Over and above the specific theorems created by men such as Desargues, Pascal and La Hire, several new ideas and outl…"

"Let Man remember that he is the Master, but not a Tyrant."

"Ribas wrote under the most favourable circumstances and made good use of his opportunities."

"His reputation as an historian rests secure upon his history of the Jesuit missions of Mexico."