Correspondence, by Benedict de Spinoza, [1883]
Written by a physician, Lambert de Velthuysen, to Isaac Orobio, and forwarded by the latter to Spinoza. It contains a detailed attack on the Tractatus Theologico-Politicus. Its tenor may be sufficiently seen from Spinoza's reply. (Written at Utrecht, January 24th, 1671.) Velthuysen afterwards became more friendly to Spinoza, as appears from Letter LXXV.