A good summary of his position is found in his First Answer to Cardinal Perron, who had challenged James I.'s use of the title "Catholic."
Descartes, known as Du Perron, from a small estate destined for his inheritance, soon showed an inquisitive mind.
He was presented by his countryman, the Cardinal Du Perron, to Henry IV.; and, though that economical prince did not at first show any great eagerness to entertain the poet, he was at, last summoned to court and endowed after one fashion or another.
His conversion to the Roman Church is ascribed to Cardinal du Perron.
In this way several Frenchmen - Benoit de Boigne, Perron and others - rose in the Mahratta service to a position dangerous to the British.
It was captured from the Mahrtatas under the leadership of Perron, another French officer, by Lord Lake's army, in September 1803, since which time it has been much strengthened and improved.
The sword in the perron (stone pillar or block), the withdrawal of which proves his right to the kingdom, is the sword of the Branstock.