“You could buy a bottle in Midlington, for example?”
“Yes, sir, at several places.”
“Are there any special marks on this particular bottle?”
“No, sir, I don’t think so.”
“Then how do you identify it?”
“It is Lambert’s Blue Label, and—”
“Just so, and we may leave it there. As far as you know, that bottle is the one from which you gave Sir Philip his drink at dinner, and which you took him at night, but there are no marks on it which enable you to identify it positively.”
“Well, of course, one bottle of Lambert’s Blue Label is very like another.”
“Precisely. Did you notice the glass?”
“Not particularly.”