The graphic to the left appeared on The Lighthouse Society of Great Britain (LSGB) website.

After much Googling for it I finally found “With regret, this website has been closed.” The information below is printed with permission of Dr. Ken Tretheway. 

Dr. Trethewy’s site had all the data from this book on line in PDF files which I am going to host here as they are priceless documents showing the inner workings of older British and Canadian lighthouses. 

The available PDF file, A Few Notes on Modern Lighthouse Practice, can be read, saved, and downloaded from this link (2.45 MB).

The drawings in the gallery below are all referred to in the PDF book but are not reproduced therein. 

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This other book, The Lighthouse Work of Sir James Chance, Baronet, which was available from the  The Lighthouse Society of Great Britain (LSGB) website is now available thanks to the University of Toronto who digitized a collection of books and put them online. We can now download the book in many formats such as PDF, MOBI, TXT, etc. Click the link above.

If you wish, you can also download only in PDF format from the Lighthouse Memories website. (8.4 MBs)