Old daffy

Some years ago when I was investigating an old abandoned township I found a clump of double daffodils growing outside one of the houses. I rather naughtily - but carefully - removed one small bulb and potted it up and over the last few years it has expanded and this year had three flowering bulbs. I planted the group out today beside a stone.

The township was built about 1790 and abandoned at the end of the 19th century, so I imagine that this is an old cultivar. I'm trying to get it identified.