About 1,000 philatelic covers, cards, envelopes, etc., that were mailed between 1870 and 1912 are described, evaluated, and illustrated (many at their original size). The first sixty pages deal with the "Large Dragon" issue and provide marvelous information on what exists. For example, all three of the U.S. Taylor and Large Dragon covers I am aware of are illustrated. This is just one example of the wealth of information presented in one place.
As a logbook of known covers from China for this period this work is an invaluable reference. If you have a cover
from this period not shown here, I suspect the authors would like to hear from you.