First published 1973 which is now out of print, I bought this from Amazon. This is one of the 2 books recommended by someone who answered my question in Quora.
The Cello by Elizabeth Cowling
This is a book about history of Cello.
‘The first comprehensive English-language biography of the instrument since van der Straeten’s History (1915) … eminently readable and of interest to historian and inquiring layman alike’ – The Musical Times.