The links in my earlier post may have been corrupted if opened in HTML format.
Here are the download links again in a shortened URL format,
PDF of PowerPoint version of shoreline analysis showing beach and flat
rock did not exist before the middle twentieth century:
http://goo.gl/dclU1U
Full version of Fairest Picture - Mark Twain at Lake Tahoe in PDF:
http://goo.gl/fxsdvl
David C. Antonucci
Autor of Fairest Picture