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PREFACE.
By Sir John Brown, C.E.
Those who did me the honour to read a short account of some strange events that occurred to me many years ago in Mexico, recently published under the name of "A Mexican Mystery," will recollect how a year after the death of my friend Pedro da Luz, I found a letter from him left in the shed where he had constructed the marvellous piece of mechanism with which that book is chiefly concerned. I did not think it necessary to mention, for it formed no part of my story, that the same case which held the letter contained a more voluminous document, which upon examination proved to be a romance of so wild a character as to confirm me in the opinion I was already inclined to
