I found this bottle of Regalia close to the spot I found the bottle of Hudson's Bay Company Whiskey mentioned in this thread: http://www.whiskymag.com/forum/viewtopic.php?t=4883&sid=b8bc5cf9023c569f2a207d16ef8fa957
Here's the text on the front of the bottle:
Very Old Specially Selected
Dublin - Paris - Antwerp
Here's are some pictures.
Since I found the new bottle I have looked very thoroughly in all the open floor joists in the back of the house. I am now tempted to expose the floor to the front of the house to see if I can find anything else, but it will cost a lot of time and money, and is not in the renovation plan or budget. If I had at least a rough idea of the value of these bottles, I might be able to justify doing the extra work if it was worth it, since I would sell any extra bottles I may find. Although I'd really be upset to do it to find nothing else...