[4] His father was Philippe d'Aquin, French physician, hebraist, philologist and orientalist, born Jewish, but who converted to Catholic Christianity.
[4] In 1650, he was among the four spagyric physicians or alchemists: Pierre Yvelin, Tobie Bloire, Louis-Henri d'Aquin and Antoine Vallot (fr).
On 12 March 1653, Louis-Henri was appointed as the King's ordinary physician and was finally ennobled by letters patent given to Saint-Germain in November 1669.
[4] “It is also said that he was involved in forensic astrology and that, having been called to give his care to the papal nuncio in Paris, he predicted not only his recovery but also his future elevation to the chair of Saint Peter."
"The pope always held the doctor in high esteem, honouring him several times with his letters and giving him a pendulum" which his grandson had kept.