Messer-Grande then made me over to the warden of The Leads, who stood by with an enormous bunch of keys, and accompanied by two guards, made me climb two short flights of stairs, at the top of which followed a passage and then another gallery, at the end of which he opened a door, and I found myself in a dirty garret, thirty-six feet long by twelve broad, badly lighted by a window high up in the roof.  I thought this garret was my prison, but I was mistaken; for, taking an enormous key, the gaoler opened a thick door lined with iron, three and a half feet high, with a round hole in the middle, eight inches in diameter, just as I was looking intently at an iron machine.  This machine was like a horse shoe, an inch thick and about five inches across from one end to the other.  I was thinking what could be the use to which this horrible instrument was put, when the gaoler said, with a smile,

“I see, sir, that you wish to know what that is for, and as it happens I can satisfy your curiosity.  When their excellencies give orders that anyone is to be strangled, he is made to sit down on a stool, the back turned to this collar, and his head is so placed that the collar goes round one half of the neck.  A silk band, which goes round the other half, passes through this hole, and the two ends are connected with the axle of a wheel which is turned by someone until the prisoner gives up the ghost, for the confessor, God be thanked! never leaves him till he is dead.”

“All this sounds very ingenious, and I should think that it is you who have the honour of turning the wheel.”

He made no answer, and signing to me to enter, which I did by bending double, he shut me up, and afterwards asked me through the grated hole what I would like to eat.

“I haven’t thought anything about it yet,” I answered.  And he went away, locking all the doors carefully behind him.

Stunned with grief, I leant my elbows on the top of the grating.  It was crossed, by six iron bars an inch thick, which formed sixteen square holes.  This opening would have lighted my cell, if a square beam supporting the roof which joined the wall below the window had not intercepted what little light came into that horrid garret.  After making the tour of my sad abode, my head lowered, as the cell was not more than five and a half feet high, I found by groping along that it formed three-quarters of a square of twelve feet.  The fourth quarter was a kind of recess, which would have held a bed; but there was neither bed, nor table, nor chair, nor any furniture whatever, except a bucket—­the use of which may be guessed, and a bench fixed in the wall a foot wide and four feet from the ground.  On it I placed my cloak, my fine suit, and my hat trimmed with Spanish paint and adorned with a beautiful white feather.  The heat was great, and my instinct made me go mechanically to the grating, the only place where I could lean on my elbows.  I could not see the window, but