and many of the Victorian line drawings will have been republished in later volumes (and spotted there). In one sense there is nothing original - every artist will tell how inspiration flows through, and doesn't originate with, a person. Yet the artist is the one with the 'rights'. On the other hand it is desperate when someone pinches your ideas - and then gets saluted for originality ! I guess it's just best to be brazen, quote the original source as explanation, and then bend it into a completely new shape. Like using a DMM to warm up the tone of a didgeridoo (for example).