The portrait demonstrates Hals' "rapid spontaneous manner of painting".
[3] The portrayed person is possibly Cornelis Schrevelius (1608–1664), a medical doctor in Haarlem between 1632 and 1641.
He was first portrayed in 1624 in a family portrait with his parents, brother and sister.
This portrait by Hals was possibly in 1704 still in the possession of his son Theodorus (1639–1704) under the name "Quacksalver".
Probably the little flattering title gives his own opinion about his former profession while he was a famous Latinist and asked several times for a medical professorship at the University of Leiden which he refused.