Stolen Time?

Below is a book about 12th Century mechanical devices.

It’s interesting and lovely on many levels but I’m finding the clocks very confusing. Now I may have misread/misunderstood but sometimes it talks about a 24 hour day.

Then a bit later it talks about the 14 and a half hours of the longest day – sunrise to sunset.

Then it talks about time candles which mark the 10 hour day. 10 hour night.

Has someone shorten our hours?

Anyway –

I have a fancy for this Elephant Water Clock that flutes and tinkles :o)

It is from this 12th Century Book

Book of Knowledge of Ingenious Mechanical Devices

And how about this super-duper speed boat?

The Ravens of Dinefwr Chronicles

The Ravens of Dinefwr is the first in a series of novels-in-progress set in the early 12th century. It follows the dispossessed members of the South Wales House of Dinefwr from their origins in Deheubarth to the centre of the known world, Jerusalem. Come and be my fellow Far-Farer. Come travelling and unravelling with me through Wales, Norway, Ireland, England, Scotland, France, Russia, Constantinople, Italy, the Balkans, the Holy Land. Come and Far-Fare through every degree on my 12th century compass.