Pieter Kornelis Braat, manager of the bookshop Blussé & Van Braam in Dordrecht. Frans Braat had written to his father, urging him to give Vincent a job. Dirk Braat, another son of P.K. Braat, recollected that there was actually no vacancy, but ‘father did not want to refuse Frans’. See Verzamelde brieven 1973, vol. 1, pp. 108-110 (quotation on p. 108).