For sometime now I have been researching population movements around Llanllyfni parish in Caernarvonshire by using census data and generally relying on FMP, and I thought that I had found a neat way to work rough estimate population numbers for the whole county. However, recently I have realised that there is a big fly in the ointment, and it has the potential to impact how people search for their ancestors.
FMP's search form has a number of boxes. Fairly high up on the form is one termed "Location in XYZ" and at the bottom of the form is a box for the "County". Each of them will autofill the county. So you would imagine that you would get the same number of records been offered up irrespective of where you entered the county name in your search. But that is not a given:
“Location in 1841” : Caernarvonshire 81, 257 Anglesey 50,836
“County in 1841” : Caernarvonshire 78,371 Anglesey 50,831
“Location in 1911” : Caernarvonshire 154,819 Anglesey 50,911
“County in 1911” : Caernarvonshire 127,454 Anglesey 50,879
I haven't checked anymore than the two counties shown, but difference in Caernarvonshire is huge. I have talked to FMP's help desk about this without success - they thought it might be a transcription issue.....
So my advice is to try both boxes individually if you are struggling to find someone.