"I had forgotten you were a bird-watcher till you reminded me just now. You went in for it at Oxford, I remember. It isn't a thing I would care to do myself. Not," I hastened to add, "that I've anything against bird-watching. Must be most interesting, besides keeping you" - I was about to say "out of the public houses" but thought it better to change it to "out in the open air". "What's the procedure?" I went on. "I suppose you lurk in a bush till a bird comes along, and then you out with the glasses and watch it."