A mechanical marvel of Edwardian-era tourism, this 1905 patent-dated accordion pull-out souvenir mail card unfolds to reveal a cascading strip of miniature photographic views of Ottawa, Ontario — the cover alone, a crisp sepia halftone panorama of the Dominion Parliament Buildings with their Gothic Revival towers and ornate stone facades, is striking enough to command attention. Published by Warwick Bros. & Rutter of Toronto and patented December 5, 1905 (No. 806831), the card conceals its surprise behind a small brass crank mechanism riveted to the cover: pull the tab and a stepped accordion of interior views tumbles out, including an "Opening Day" parliamentary scene and a handsome view labeled "Post Office." The device — catalogued internally as No. 506 — exemplifies the novelty postcard craze that swept North America in the early 1900s, when publishers competed fiercely to produce mailable keepsakes that doubled as parlor entertainment. Never mailed, never addressed, this example survives in Good condition with expected toning, edge wear, and a crack across the cover consistent with age; the brass pull mechanism is intact and functional.