SHORT STORY WRITING   some old belief vitalized by its bearing on our lives to-day, an analysis of an obscure calling, a glimpse at a forgotten quarter ... but one thing it can never be—it can never be 'a novel in a nutshell'." "A short story ... must lead up to something. It should have for its structure a plot, a bit of life, an incident such as you would find in a brief newspaper paragraph.... He (Richard Harding Davis) takes... more...