James Howell describes him as being from his youth bred up at court, and "employed in many negotiations of good consequence both at home and abroad".
[1] Sanderson was author of Aulicus Coquinariæ, or a Vindication in Answer to a Pamphlet entitled “The Court and Character of King James” (1650).
This involved him in a controversy with Heylyn, who published, early in 1658, Respondet Petrus, or the Answer of Peter Heylyn, D.D., to Dr. Bernard's Book entitled “The Judgment of the late Primate of Ireland,” to which is added an Appendix in Answer to certain Passages in Mr. Sanderson's “History of the Life and Reign of King Charles”.
Heylyn rejoined in his Examen Historicum (1659), over two hundred pages of which consist of a searching criticism of Sanderson's historical works.
[1] Sanderson married, about 1626, Bridget, daughter of Sir Edward Tyrrell, baronet, of Thornton, Buckinghamshire; she was mother of the maids of honour to Catherine of Braganza, died on 17 January 1682, and was buried in Westminster Abbey.