Let painstaking accuracy be your aim for a long time. When your eye and hand have acquired the power of seeing and expressing on paper with some degree of accuracy what you see, you will find facility and quickness of execution will come of their own accord. In drawing of any expressive power this quickness and facility of execution are absolutely essential. The waves of emotion, under the influence of which the eye really sees in any artistic sense, do not last long enough to allow of a slow, painstaking manner of execution. There must be no hitch in the machinery of expression when the consciousness is alive to the realisation of something fine. Fluency of hand and accuracy of eye are the things your academic studies should have taught you, and these powers will be needed if you are to catch the expression of any of the finer things in form that constitute good drawing.