His debut for Haarlem society in 1616 with his large group portrait for the St George militia shows all three disciplines .
If that painting was his signboard for future commissions , it seems he was subsequently only hired for portraits .
His debut for Haarlem society in 1616 with his large group portrait for the St George militia shows all three disciplines , but if that painting was his signboard for future commissions , it seems he was subsequently only hired for portraits .