This is what I should have started with. I am new to this forum. Go to www.com, type in Albert Bigelow Paine Mark Twain. This will take you to where you can get the text of his biography of Mark Twain. The second page should answer your question. In frount of book , To Clara Clemens Gabrilowitsch who steadily upheld the authors purpose to write history rather than eulogy as the story of her fathers life. Many times we can not prove ancestory as accurate as we would like to. I found out there is more than one version to the Lampton ancestory. Some believe one some the other ,some both. Maybe it can be figured out,good chalenge.The other book i mentioned is Jane Clemens. I did not get the authors name just copied down a page on the copy machine. I use the library computers and would loose my computer if I went hunting for this book in the library where I was at. This other book is good enough.