Chronograms Collected: More Than 4,000 In Number is a book written by James Hilton that is dedicated to the collection of chronograms. A chronogram is a word or phrase in which certain letters can be interpreted as Roman numerals that, when added together, give the date of the event being commemorated. The book contains over 4,000 chronograms that have been collected from various sources, including inscriptions, manuscripts, and printed works. The...