37 Wharf Street, Small box. Note the slot as in full size Letter Receiver The Royal Australian Historical Society is offering a 20% discount on Adel Briggs' book 'Cast Iron - New South Wales Letter Receivers' for users of Flickr. Call the RAHS on (02) 9247 8001 or email admin@rahs.org.au to order your copy and mention Flickr to receive your discount!