Cheatsheet:
· find locations in that gridsquare
wall tq8092, hectad
wall sh65 or myriad!
wall tq
· prefix a keyword with - to
exclude that word from the match; example :
stone wall -sh
· can use OR to match
either/or keywords; example:
bridge river OR canal
· start with ~ so that
any word is matched; example:
~train railway track