Dear Susie: There are customary ways to begin a letter and end it, to address the envelope and set it to post. We have delivered to you (while you slept so prettily, your pale face a serene oval in the moonlight) this polite and improving manual of letters for the Fair Sex. We know you will be grateful. Do be aware that some correspondences may involve vows of fealty, freshly spilled blood, supernatural appeals to divine beings, and sacrifices of unusual scope. A modern lady avoids squeamishness about such matters.