This final episode was the last word I received from Eugene, but I knew the number of the house, 252 Rue M. le Prince. So, after a day or two given to a first cursory survey of Paris, I started across the Seine to find Eugene and compel him to do the honors of the city. Every one who knows the Latin Quarter knows the Rue M. le Prince, running up the hill towards the Garden of the Luxembourg. It is full of queer houses and odd corners,--or was in '86,--and certainly No. 252 was, when I found it, quite as queer as any. It was nothing but a doorway, a black arch of old stone between and under two new houses painted yellow. The effect of this bit of seventeenth-century masonry, with its dirty old doors, and rusty broken lantern sticking gaunt and grim out over the narrow sidewalk, was, in its frame of fresh plaster, sinister in the extreme. I wondered if I had made a mistake in the number; it was quite evident that no one lived behind those cobwebs. I went into the doorway of one of the new hôtels and interviewed the concierge. No, M. d'Ardeche did not live there, though to be sure he owned the mansion; he himself resided in Meudon, in the country house of the late Mlle. de Tartas. Would Monsieur like the number and the street? Monsieur would like them extremely, so I took the card that the concierge wrote for me, and forthwith started for the river, in order that I might take a steamboat for Meudon. By one of those coincidences which happen so often, being quite inexplicable, I had not gone twenty paces down the street before I ran directly into the arms of Eugene d'Ardeche. In three minutes we were sitting in the queer little garden of the Chien Bleu, drinking vermouth and absinthe, and talking it all over. "You do not live in your aunt's house?" I said at last, interrogatively. "No, but if this sort of thing keeps on I shall have to. I like Meudon much better, and the house is perfect, all furnished, and nothing in it newer than the last century. You must come out with me to-night and see it. I have got a jolly room fixed up for my Buddha. But there is something wrong with this house opposite. I can't keep a tenant in it,--not four days. I have had three, all within six months, but the stories have gone around and a man would as soon think of hiring the Cour des Comptes to live in as No. 252. It is notorious. The fact is, it is haunted the worst way." I laughed and ordered more vermouth.