When you're reading, you're not where you are; you're in the book. By the same token, I can write anywhere.
As usual, the note occupied less than a page and included neither salutation nor closing, Uncle Hal's opinion being that since the letter had a direction upon it, the intended recipient was obvious, the seal indicated plainly who had written it, and he did not waste his time in writing to fools.
People assume that science is a very cold sort of profession, whereas writing novels is a warm and fuzzy intuitive thing. But in fact, they are not at all different.