I have only gotten a few bookplates there but hope springs eternal..
The trip as it turns out was productive.. Here is what I found:
The artist was A. G. Hull a cartographer also from Moorestown New Jersey.
Any additional biographical information about the owner or the artist would be most welcome.
The second bookplate was for Oscar F. Roller an early 20th century lithographer in Philadelphia
I contacted David Doret , a knowledgeable lithographic collector and he referred me to
Philadelphia on Stone Biographical Dictionary, Library Company of Philadelphia,
.The search did not unearth any information about Mr Roller but the database is an excellent resource so here is a link: