I see I have made my self a slave to Philosophy.
Stephen Jordan Rigaud, Isaac Barrow, John Flamsteed, Isaac Newton, Johannes Wallis (1841). “Correspondence of Scientific Men of the Seventeenth Century, Including Letters of Barrow, Flamsteed, Wallis, and Newton, Printed from the Originals in the Collection of the Earl of Macclesfield (published by Stephen Jordan Rigaud)”, p.405