eleven
o'clock
On the other hand , Albert knows Keggs . We must leave the matter open . Of course , appearances are deceptive . Anyone , for instance , who had been standing outside the front entrance of the castle at eleven o'clock on a certain June morning might easily have made a mistake . Such a person would probably have jumped to the conclusion that the middle-aged lady of a determined cast of countenance who was standing near the rose-garden , talking to the gardener and watching the young couple strolling on the terrace below , was the mother of the pretty girl , and that she was smiling because the latter had recently become engaged to the tall , pleasant-faced youth at her side . Sherlock Holmes himself might have been misled . One can hear him explaining the thing to Watson in one of those lightning flashes of inductive reasoning of his .