Just as a matter of interest (for anyone interested ) My grandfather pioneered those tide guides. His name was Bill Devonshire but was better known as Cyclone Bill as he had a particular interest in predicting cyclones etc..
When he died in the mid 70's the books continued under the direction of his 2 understudies and my mum continued to receive some royalties for a number of years.. Unfortunately the royalties no longer turn up so I guess that side of things has timed out or whatever.
My grandad was a cluey bugger when it came to the weather.. having worked a number of light houses around the place and being a fisherman for his entire life he had thousands of slides of sunsets and cloud formations that he compiled.. I guess they meant something to him but I am still scratching my head trying to pick a good day to go fishing. lol