midnight
` Oh , of course ! ' he replied . ` In fifteen minutes , madame ? ' `` I did n't fancy going out at midnight , yet I had undertaken the matter and I would see it through . I had not changed from my travelling suit and it had n't a pocket in it ; nor had I one such as Madame Durrand employed , so I was carrying the letter pinned inside my waist . Now I took it out and put it in my hand-bag , all the while thinking over the affair and liking it less the more I thought . It was pretty late at night , and there was something suspicious about the affair .