Gear's illustrated catalogue of wood and iron working machinery (1872)
A.S. Gear, Gear, A. S · Boston : Printed at A.S. Gear's printing office, 62 Sudbury Street · leaf 483
and never in a single instance have any of the grooves in the checks been crushed so as to prevent the passage of the stationdirection-tickets in and out of their proper place. The check is so perfect and simple in its operation that our baggage-menwould be very unwilling to return to the old style…
