"To take just one example: in 1620 the Flemish diplomat Constantin Huygens witnessed him directing his own music for Vespers for the Feast of St John the Baptist (24 June) in a church that has been identified as S Giovanni Elemosinario, near the Rialto; the music was sung by twelve singers and accompanied by theorbos, cornetts, bassoons, a basso di viola, organs and other instruments." . . . .