Six o'clock
That his shoulders are broad is apparent at a glance ; that upon them is placed a shapely head , well thatched with crisp black hair , is also seen at once ; that the head is not an empty one is proved by the picture on the easel , which is sufficiently advanced to show correct and spirited drawing . A brain that can direct the hand how to do one thing well , is like a general who has occupied a strategic point which will give him the victory if he follows up his advantage . A knock at the door is not answered at once by the intent and preoccupied artist , but its sharp and impatient repetition secures the rather reluctant invitation , `` Come in , '' and even as he spoke he bent forward to give another stroke . `` Six o'clock , and working still ! '' cried the intruder . `` You will keep the paint market active , if you achieve nothing else as an artist . '' `` Heigho !