Figure 3 Detail of the interlocking drawers and prospect box of the desk- and- bookcase illustrated in fig. 2 (Photo, Milwaukee Art Museum.) The lock on the prospect door of the bookcase controls access to eight smaller drawers. When this door is open, a wooden spring lock releases the fascia drawer above and sliding wooden bolts let into the underside of the shelf release the two Doric column document drawers. These interlock with drawers above and below. The prospect section of the desk is held with two wooden spring locks. It houses two secret document drawers and originally concealed a secret compartment faced by a hinged false backboard.