Thank you! Thank you!! This is exactly the sort of information that I was looking for. I will print our your message to refer to frequently as I work my way through possibilities.
So disappointing that census records previous to 1901 are gone forever. I was looking specifically for those . . . I had thought perhaps for some obscure reason they were no online yet but would be in the future.
I know my families were Catholic. Are parish records a good source? I suppose you need to know which parish!
Since the 1901 and 1911 reported the head of household as a 'servant - gardener' I assume he/they did not come from a land-owning family. This could be a futile search! But I will push ahead.