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Thank you to GlenC, Mickoking, jjjnettie and Ric, I hope you all enjoy the book, I particularly like the hand drawn images, they look fantastic and you have to remember the quality and size of the equipment used, especially at the start of the observations.
The other really interesting point is that despite the observations becoming less in number as Charles Grover aged, you still have a consistent 49 year period recorded by the one man. Even though he aged over those 49 years, the meticulous attention to observing notes does not seem to change and it's the consistency that is the key issue.
To be honest even though I formatted every page and did the code to get it on the Net, I have not actually thoroughly read it myself yet, so I am looking forward to a few days off to actually read it from start to finish. Once again thank you so much for your warm replies, I will pass them on to Jerry Grover in England who will be most pleased indeed.
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