Took 10 months to solve! Sandymount Castle, Dublin.

You'd all thwarted my previous attempts at providing a difficult challenge from our "unknown location" Fergus O'Connor Collection images, nonchalantly despatching some of them in as little as 30 minutes. Well not this one, Flickroonies! I had threatened to eat the original glass plate negative if this one was solved quickly, but as it took us 10 months, don't think I have to make good on that offer.

All we had on this one was "Large house, with a clock tower and crenellated rooftop, in an unknown location", and the clock told us it was taken around 11:45. Though the time didn't help much, the clock tower certainly did. Almost 10 months to the day from its original posting, zetetic2006 said:

"I recognised it immediately! It's Sandymount Castle on Sandymount Green in Dublin, the crenellated clock-tower is a giveaway. The rear of the castle backs onto the southern side of the Green where you can still see the clock tower, check out Google Maps. The view in this photo is no more, Castle Park was built in these grounds, sometime in the 50's or 60's I think."

Date: 1900-1920