|Arms of John Montagu, the 2nd Duke of Montagu (1690-1749) on covers and his badge on spine of:
Francis Howgil. The Dawnings of the Gospel-Day, and its Light and Glory Discovered [London: s.n.,] Printed in the year 1676. Call number: (Ex) 5638.479q.
See also British Armorial Bindings, http://armorial.library.utoronto.ca/stamp-owners/MON007