This shaft was about five hundred paces long, and had over a thousand positions for prisoners. Its water supply came from a cistern sunk into the stone at the top of the cliff, and sanitary wastes were disposed of by flushing the shaft whenever this cistern threatened to overflow. A sewer drilled at the lower end of the shaft conveyed the wastewater to a conduit at the cliff base that ran through the wall of the Capulus to empty into the Acis below the city.

The rectangular bartizan clinging to the cliff, and the shaft itself, must originally have constituted the whole of the Vincula. It had subsequently been complicated by a confusion of branching galleries and parallel shafts resulting from past attempts to free prisoners by tunneling from one or another of the private residences in the cliff face, and from countermines excavated to frustrate such attempts — all now pressed into service to provide additional accommodations.

The existence of these unplanned or poorly planned additions rendered my task much more difficult than it would otherwise have been, and one of my first acts was to begin a program of closing unwanted and unnecessary passages by filling them with a mixture of river stones, sand, water, burned lime, and gravel, and to start widening and uniting those passages that remained in such a way as to eventually achieve a rational structure. Necessary though it was, this work could be carried forward only very slowly, since no more than a few hundred prisoners could be freed to work at a time, and they were for the most part in poor condition.

For the first few weeks after Dorcas and I arrived in the city, my duties left me time for nothing else. She explored it for us both, and I charged her strictly to inquire about the Pelerines for me. On the long journey from Nessus the knowledge that I carried the Claw of the Conciliator had been a heavy burden. Now, when I was no longer traveling and could no longer attempt to trace the Pelerines along the way or even reassure myself that I was walking in a direction that might eventually bring me in contact with them, it became an almost unbearable weight.