To find out more, you might try the following:
* Search for his name in online book catalogs: Try searching for "Edward George Apgar" on sites like WorldCat, LibraryThing, or the Internet Archive.
* Check online literary databases: Search for his name on sites like Goodreads, Project Gutenberg, or the Library of Congress catalog.
* Look for local historical records: If you know where Apgar lived, you could try contacting local historical societies or libraries to see if they have any information on him.
* Consult with experts: You could try contacting an expert in literary history or bibliography to see if they can provide any information on Apgar.
Without more information, it is difficult to say definitively what Edward George Apgar has written. However, by conducting thorough research, you may be able to uncover more details about his life and work.