Lately I have been using a very useful site to help find other cards in a particular series I want. That site is TuckDB. It is a database of Raphael Tuck & Sons postcards. You can search by using keywords, and the results will show you the set title, any comments, how many cards are in a set, estimated value, and more! There are over 27,000 sets in the database and over 130,000 postcards. Check it out!
John Jameson & Son Exhibit postcard from the main page of their website.