Sometimes a client would extract a pledge from the artist, as did Sir Richard Newdegate from portraitist Peter Lely (van Dyck's successor in England), who promised that the portrait would be "from the Beginning to ye end drawne with my owne hands."
Nogle gange kunne en kunde aftvinge et løfte fra kunstneren, som Sir Richard Newdegate gjorde af portrætmaleren Peter Lely (van Dycks efterfølger i England), der lovede at portrættet ville "fra begyndelse til slutning være malet med mine egne hænder." (en. "from the Beginning to ye end drawne with my owne hands.")