Thanks for posting the photograph. Like you this was new to me. I have had a look at some history sites and some maps. Bathgate Park was situated off the Canongate and was bordered by New Street. The 1896 Ordnance Survey map shows this as a gas works. However, the gas works closed around 1900. After the closure the site lay derelict for a short time before being claimed as a football park - Bathgate Park – but in 1926/27 it became the New Street Bus Depot.
Bathgate Park was a cinder pitch and the home of Junior team Edinburgh Emmet but was also heavily used for other matches, e.g. juvenile, local cup finals, etc. It was also used for band concerts and other sports and in something I read was described as “
the lung of the Canongate”.
The Edinburgh Corporation sold a 3.49 acre site that included Bathgate Park to the Scottish Motor Transport Company for £17,500. The Edinburgh Evening News reported “
Apart from Tynecastle and Easter Road enclosures, has attracted than any other Association football ground in the city”. I have seen a note of a crowd of 7,000 at one game. The last report of football being played there is in August 1926. The Corporation found Emmet another temporary ground on land they were building on at Prestonfield in the south of the city. Emmet officials, while pleased they had a ground, were concerned with being decanted so far from the centre of the city. The temporary ground was very soon taken up for housing and the club moved to Meadowbank. The club ceased to exist in 1930.
After I had found this out I found this thread from 2007:
viewtopic.php?start=15&t=842