My mum found a really old book called "With Cradle and Clock" by Knud Stowman. It has a price on the inside cover of 9s. 6d. It was published by "Hurst and Blackett", it doesn't have a date, and it is in good conndition with hardback and dust cover. My mum can't be bothered to read it so she wants to know, what it is about, how old is it, and most of all, is it worth anything?