This cache helps you along the coast, brass rubbing as you go.
Possibly best to do this on a dry day. Ideally not windy!
The sixth brass rubbing depicts a couple of interesting-looking Romans and a temple.
http://www.edinburgh.gov.uk/info/20179/park_activities_and_events/98/brass_rubbings_trail
has a page that gives a little information, but it appears to be a little out of date - although it has recently sadly become a little more accurate.
One or two of the cache hides are not in particularly salubrious locations (but not awful!), but the primary idea of this series is to bring you to the brass rubbing.
If you are wanting to bring something to swap in these containers, crayons could be ideal!