The St. James's Gate Brewery belonging to Guinness had what was apparently, apart from the bog railways of the Midlands, the longest private railway system in Ireland. In total there were 10 miles of track of which 8 miles were narrow gauge. There were some interesting innovations in lured within the system - a spiral in narrow gauge allowing trains to pass under St. James's Street, an ingenious conversion wagon which allowed narrow gauge locomotive to work on the broad gauge sidings, a unique design of narrow gauge locomotive specifically suited to the needs of the site. This is another post prompted by reading 1951 editions of The Railway Magazine! http://rogerfarnworth.com/2019/04/26/the-guinness-brewery-railways-dublin
A short note about a couple of publications which focus on the Guinness Brewery Railways. ..... http://rogerfarnworth.com/2020/07/22/the-guinness-brewery-railways-dublin-again
Very interesting, Roger. I visited Ireland and the Guinness brewery back in 1998 and saw no evidence of the railway. However my memory is not that good any more.