Hi Appletree
This could be them in the 1891 census at Mitcham in Surrey
John HALDEN head mar 28 cutler b.Ramsgate Kent
Priscilla wife 25 b.Chatham Kent
Emily dau 5 b.Greenwich Kent
John son 3 b.Dulwich Surrey
Bella dau 7m b.Packham Wood Kent
RG12/601 folio 14 page 37
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This family appear to be on the 1911 census (YEALDING in Croydon) but you will need to pay to see the details
http://www.1911census.co.uk/Do you have a copy of John and Priscilla's marriage to give, hopefully, the names and occupations of their respective fathers?
Many of the YELDINGs (and variants) later became HILDENs - they sound very similar with a silent "H" and there were YELDINGs in/from Kent (now HILDENs) who were travellers (not showmen). I think your mum is right - mention the name
HILDEN to any Kentish travelling family and they will recognise it

Casalguidi
