His main bequest to architectural history were his three architect sons, and in particular Robert Adam, whose success as developer of the "Adam Style" far outran that of his father. Although Robert formed his own style through lengthy study in Rome, John Fleming detects traces of his father's influence on all three of the brothers' work, and suggests that the Adam principle of "movement" in architecture was partly inspired by William's admiration for Vanbrugh. More concretely, Fleming notes that working with their father gave the brothers a solid grounding in the technical aspects of architecture, and introduced them to a set of clients which they might never otherwise have had access to.