WikiArt.org is “the online home for visual arts from all around the world
whose goal is to make the world’s art accessible to anyone and anywhere.”
Here are the profiles of the Tanners:
https://www.wikiart.org/en/mel-tanner
https://www.wikiart.org/en/dorothy-tanner
You can also find more information about the Tanners on Wikipedia
and on the bio pages at www.lumonics.net
