Excerpt from Memoirs of Robert-Houdin, Vol. 2 of 2: Ambassador, Author, and ConjurorWhen one of these gentlemen rang at my door, an electric communication struck a bell in my workroom I was thus warned and put on my guard. My servant opened the door, and, as is customary, inquired the visitor's name, while I, for my part, laid my ear to a tube, arranged for the purpose, which conveyed to me every word. If, according to his reply, I thought it as well not to receive him, I pressed a button, and a white mark that appeared in a certain part of the hall announced I was not at home to him. My servant then stated I was out, and begged the visitor to apply to the manager.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.