Friday: 34 or 44 Lothian bus from the Centre of Edinburgh for a mid-day (12:00 to 12:30) start from the Water of Leith Visitor Centre, 24 Lanark Rd, Edinburgh EH14 1TQ and cross the road and follow the path up to The Spylaw Tavern in Colinton.
About 1½ hours walking/crawling or half that running.
Then onwards up the path to The Grey Horse, Balerno.
About 2 hours walking or half that running.
44 Lothian bus back to the West End / Princess Street.