Some groups also collected propaganda leaflets dropped by Allied aircraft and pushed them through letterboxes. The sheets that were photocopied turned out to be leaflets, which Betty posted through letterboxes. In 1989 Ahmadi Muslims posted religious pamphlets in letterboxes, including those belonging to mainstream Muslims. Elsewhere in Manchester women had poured ink into eleven letterboxes damaging 250 letters. Clues to American letterboxes are commonly published on several different websites. They then moved on to writing tracts and putting them into people's letterboxes. Individual letterboxes usually contain a logbook and a rubber stamp. While purists recognize only those letterboxes planted in the wild, many new variations exist. His rooms had double letterboxes, one for in-coming and another for out-going mail. A record dividend is due to drop into shareholders' letterboxes . The main colours of the letterboxes were black and pink. Individual letterboxes contain a notebook and a rubber stamp, preferably hand carved or custom made. On Building was designed to construct the letterboxes on every floor. Letterboxes and the undersurface of toilet seats are common sites. There are now many different kinds of letterboxes, each with some specific distinction.