This is a revised version of the author's 1969 doctoral dissertation. Grimm's catalogue lists only 168 authentic paintings by Hals, far fewer than the 222 accepted by Slive in his roughly contemporary 3-volume catalogue raisonné (see entry cited in this database). A number of the works listed in Slive are reattributed by Grimm to Jan Hals, Frans Hals the Younger, and an artist he refers to as the "Meister der Fischerkinder".