REGARDING your invitation to drop a line to your letters page if you have a 'bee in your bonnet' about anything that annoys you. One of my bees is — whatever happened to bicycle bells? I, or my dog, have just escaped a nasty encounter with a bicycle on several occasions. Only once in all my bicycle encounters has a warning bell been sounded to warn of a cyclist's approach. Bee number two, on a more delicate vein is, I do wish when using the public toilets, the person who uses the toilet paper before the next user would have the consideration to leave a convenient sheet ready for the next person's use. The elderly and the blind in particular may find this very helpful. Diana Mudd Tavistock