Len Hiley talks here about SARAH – the Simple And Reliable Automatic Helm:
John Letcher’s “Self-steering for sailing craft” is a good resource and of interest to anyone using self-steering, with or without vane gear.
You can see it below, copyright John S Letcher and with kind permission of the author, who made many small boat ocean voyages and contributed much to the development of yacht self-steering.
Extract on sheet to tiller self-steering from Gerard Dijkstra’s book “Self steering for Yachts”:
Many thanks to Len Hiley for converting John Letcher’s book to pdf files and
obtaining permission from John Letcher and Gerard Dijkstra.
Jester Challenge 
Interesting read, pages 232 & 233 about watch keeping are missing unfortunately.
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HI Graeme, Thanks to Len’s efforts we now have the missing pages.
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Thank you for getting back to me to let me know. And thank you to Len for his efforts.
Cheers
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many thanks – shame that page 110 is missing!
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This is really good and valuable information. It is appreciated and will give me yet another challenge.
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thank you very much I very much appreciate the information ad your efforts in comm unicating your knowledge
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