I would guess that there were tennis courts and a bowling green for the use of
Guys Hospital staff in the 19th century in that area before all the flats were built. Probably a map in John Harvard might help.
I read somewhere that back in medieval times Borough High Street was a bit of a rest and recreation area for Londoners, with loads of taverns and entertainment, and behind the taverns were areas for games, which is why you have Tennis Street and Bowling Green Place.
Don't know how true this is, but it sounds plausible to me.
Elizabeth Newcomen was a wealthy elizabethan lady who out lived three husbands..and managed to hold on to her dosh! There was a small school on newcomen street ( corner of bowling green), it was a very small school, about 90 or 100 pupils. rotten uniforms though with a stupid yellow tassel hanging off the berets!
Never know why it was demolished though, it was a lovely building, dunno where english heritage was at that time. She owned quite a bit of guys hospital grounds too as i recall our principle telling us. wonder what happened to those grounds when guys rebuilt?
Elizabeth Newcomen was a benefactress, mostly housing, clothing and educating destitute local young women I believe. Her benefaction still survives today in the form of the Newcomen Collett Foundation, a local charity. The Guys connection I'm not familiar with, but Elizabeth Newcomen House is a nurses home for the hospital, and there is a Newcomen Clinic.
As for Tennis St and Bowling Green Place, I have wondered about those for years, seeing as I live in the crook of land between these two streets and Newcomen St. Long ago I went down to examine the wondrous collection of old maps housed at the Local Studies Library (well worth a visit) but could see no signs of any ancient sporting facilities going back through the years. Any enlightenment gratefully received.
Now as for why King St was so called, that's a whole other story....