We haven’t been able to find a miller listed in the 1841 Census, although Richard Gutteridge who the mill was built for in 1839 is living on West Street:
1841 Census Dunstable HO107/5/8 Folio 11
West Street
Richard Gutteridge, 60, Farmer
Sophia Gutteridge, wife, 45
Caroline Gutteridge, daughter, 20
Matthew Gutteridge, son, 20
By 1851, there is a miller listed:
1851 Census Dunstable HO107/1757 Folio 153 Page 38
West Street
James Reynolds, 38, Miller, Herts St Stephens
Mary Ann Reynolds, wife, 37, Miller’s Wife, Herts St Stephens
Sarah Ann Reynolds, daughter, 17, Straw Bonet Sewer, Herts St Stephens
George Reynolds, son, 15, Miller’s Son, Herts St Stephens
Henry Reynolds, son, 9, Scholar, Beds Dunstable
Edward Reynolds, son, 6, Scholar, Beds Dunstable
Rosehannah Reynolds, daughter, 3, Beds Dunstable
Oliver Reynolds, son, 1, Beds Dunstable
Samuel Collins, visitor, 42, Miller, Herts St Stephens
1851 Census Dunstable HO107/1757 Folio 154 Page 41
West Street
Richard Gutteridge, 70, Landed Proprietor, Beds Woburn
Sophia Gutteridge, wife, 53, Landed Prop. – Wife, Beds Bromham
Caroline Gutteridge, daughter, 33, Landed Prop. – Dau, Beds Dunstable
Jane Gutteridge, daughter, 29, Landed Prop. – Dau, Beds Dunstable
1861 Census Dunstable RG9/1011 Folio 4 Page 2
West Street
James Smyth, 52, Miller in Flour Mill, Essex Royden
Keziah Smyth, wife, 45, Bonnet Sewer, Herts St Albans
Charles Smyth, son, 16, Herts Watford
Mary A Smyth, daughter, 10, Scholar, Herts Watford
George J Smyth, son, 6, Scholar, Beds Dunstable
1861 Census Dunstable RG9/1011 Folio 7 Page 8
West Street
Sophia Gutteridge, 63, Independant, Beds Bromham
1871 Census Dunstable RG10/1567 Folio ? Page 4
West Street
James Smyth, 65, Miller, Essex Royden
Keziah Smyth, wife, 56, Herts St Albans
George Smyth, son, 16, Miller, Beds Dunstable
1881 Census Dunstable RG11/1646 Folio ? Page 8
49 West Street
Elizah Smyth, 68, Dressmaker, Herts St Albans
George Smyth, son, 28, Miller, Beds Dunstable
Mary A Tomkins, daughter, 30, Bonnet Finisher, Herts Watford
Eliza Tompkins, grand-daughter, 11, Scholar, Beds Dunstable
1891 Census Dunstable RG12/1269 Folio 44 Page 9
49 West Street
George Smyth, 37, Miller, Beds Dunstable
Lillie Tompkins, niece, 20, Housekeeper, Beds Dunstable
1901 Census Dunstable RG13/1512 Folio ? Page 6
50 West Street
George Smyth, 45, Flour Miller, Beds Dunstable
Lizzie Tomkins, niece, 30, Charwoman, Beds Dunstable
1911 Census Dunstable RG14 RD178 RS1 ED2
39 Prosperous Row
George Smyth, 53, (Boarder) Miller Journeyman, Hockliffe Beds
It looks like James Reynolds was the original miller from about 1843 and James Smyth, a miller from Chesham Bois, Buckinghamshire, took over in about 1855. On his death in the 1870’s , his son, George, became miller until his death after 1901