Buildings on London Bridge tended to be made by trial and error. Starting with a scheme that was more or less sane, in the broad sense that it had not fallen down yet, proprietors would enlarge their holdings by reaching out over the water with cantilevered add-ons, buttressed with diagonal braces. This was the trial phase. In the next, or error phase, the additions would topple into the Thames and wash up days later in Flanders, sometimes with furniture and dead people in them. Those that did not fall into the river were occupied, and eventually used to support further enhancements. Countless such iterations, spread thick over centuries, had made the Bridge as built-up as the laws of God and the ingenuity of Man would allow.