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Oh, that is just too good!
Great research and support links! Thanks for the wonderful bonus!

The researcher did not offer anything new that I did not already know.
However - the web site addresses may be useful.

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Thank you.

I appreciate the fact that you answered my question with me in mind,
and that you explored virtually every possible thought that I was
thinking but did not write down.   Plus, it was nice that you wrote a
bit on your own before just throwing a bunch of links at me... it was
appreciated, to say the least :-))

thank you very much, it was a great pleasure to read your answer.

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Yes very well done Knowledge-seeker and made entertaining reading as
well. And yes you are right I really am a master mathemetician
specialising in geometric puzzles just trying to test the skills of GA
researchers, incognito

This would have been a great answer except for the fact that there
does not seem to be data available from the XIX century, which is not
the researcher's fault.

Thanks. I will definitely keep Google Answers in mind for the next
time I happen to need data such as this.

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Comprehensive and well composed.
Thank you for your effort.
Kemlo

Really comprehensive answer and steps taken to go that extra mile
really appreciated. Thanks.

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This researcher obviously went at this with some enthusiasm and gusto.
 The research was well done and was along the lines of what I was
hoping to receive.  Thanks...

thanks for the help, I'll be in touch

K: If I end up having success with the sale of the sketchbooks then I
will be able to show my appreciation for your answer. You covered it
all, supplied links, suggestions on h/t gain the knowledge I need to
be able to present myself and my wares intelligently; you are
obviously quite knowledgeable on the subject. I am intrigued by your
mention of antique books, as that is the area I have some knowledge
in, having compiled a bibliography of a rare book dealer's personal
library - fascinating stuff that I can't get enough of! Many thanks
for your direction!

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A five star answer!!!!! THANK YOU

good but having to pay is really bad

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Thanks -K~. While much of that is over my head (I belong to the point
and click school of photography), I think I get the gist of what
happened now. I can sleep again. ;-)

What a great job you did.  Thanks so much!  How do I contact you if I
have a follow-up question?  I am at rtolmach@earthlink.net

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Great to get web sites in the answer!

Well thought out and goes far beyond the question I asked.  Thank you.

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Hi knowledge_seeker-ga, hey thanks so much for the thorough,
well-documented, and speedy answer -- it exceeded my expectations!

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To: knowledge_seeker. Wow. I feel strangely elated knowing that 1) A
longstanding mystery has been solved and 2) You and your cohorts are
just hanging around waiting to help me out the next time that a
question pops to mind. Thank you. Thanks also to those who commented.
Support your local giraffe!

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Knowledge-Seeker did a very good job on this report. It was certainly
quick--always good for the first three stars in my book, so long as
the answer is there as well (sometimes it isn't!). The fourth star was
for comprehensiveness of the response. It relied, perhaps, too much on
regional rather than cumulative national resources and some of the
data was not entirely pertinent to the questions asked; however, the
regional resources were well chosen and the documentation/citations
were complete. A solid B+/A-.

Thanks very much for this prompt and thorough answer.  You also
correctly construed my question, and I appreciate that you took that
initiative rather than waiting for clarification.

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I'm thrilled with the thorough answer i received! this is a great
service! thanks, judi

well done.  thank you.

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Thanks!
This is exactly what I needed. Also, thanks to everyone who left
comments. This is one of my first questions and I appreciate your tips
on asking questions.