I was wondering about this as well. The only thing i could find was this from the TOC "We do not try to limit the use of the Illustrations available on OBI, but

I was wondering about this as well. The only thing i could find was this from the TOC "We do not try to limit the use of the Illustrations available on OBI, but we cannot guarantee these Illustrations are noninfringing, or legally accessible in your jurisdiction and your use of them is solely at your own risk. Although we do our best to offer only Illustrations that are considered public domain in most countries, copyright laws vary from one jurisdiction to another, and you agree that you are solely responsible for abiding by all laws and regulations that may be applicable to using the Illustrations." [1]: http://www.oldbookillustrations.com/terms-of-use/ http://www.oldbookillustrations.com/terms-of-use/