midnight
As soon as the doctor was within striking distance , the shadow struck and down went the doctor . He was hit with some padded weapon a glancing blow that merely knocked him out for a few hours . If it had struck full -- well , we would have been shy one good doctor . `` When he was all right again , we put our heads together , and decided to bait the midnight visitor with some bogus papers . Of course we still did not have the least suspicion as to the real source of the trouble . `` That mate was in our confidence , and was at all our consultations . We followed clew after clew suggested by him .