Liz Gibson has a fax machine for official use. When telephoning outside the Observatory, the number to be dialled must be prefixed by a ``9'' to get an outside line. Almost all the telephones in the Observatory are set not to call outside Edinburgh between Friday evening and Monday morning, although they can make international calls during the week. Calls made are logged and all personal calls, except reasonable, necessary local ones should be paid for. The fax number is 0131-668-8416.