General drawings (views, cross-sections, floor plans, etc.) and detail drawings (mainly design sketches), a number of sheets are provided with budgets of costs, credited to Van der Biesen and [B.J.] Sterck, stamped by *P.J.H. Cuypers archives* with negative numbers 195 and 196, scale 1 to 50.
NB Possibly also preliminary sketches of own residence, Vondelstraat 77-79.