FIRMIN (Thomas), an eminent citizen of London, born in 1632, who distinguished himself by his public benefactions and extensive charities, as also by some opinions contrary to the received doctrine of the Trinity. The plague in 1665, the great conflagration in 1666, with the arrival of the French protestants in 1680 and 1681, all furnished him with great opportunities of exerting his benevolent disposition. He died in 1697; and was buried in the cloisters of Christ's hospital, where his virtues are recorded in a monumental inscription.