« Reply #5 on: Wednesday 24 December 25 21:15 GMT (UK) »
I have an ancestor's cousin in rural Oxfordshire in 1851 who was enumerated in a barn, and was described as a "tramp".
I have one ancestor missing from the 1881 census but he was never homeless as far as I know, he was a rural Essex ag lab, and just seems absent in 1881. Maybe he was working away and was not enumerated, or slept in a field on census night.

Researching:
LONDON, Coombs, Roberts, Auber, Helsdon, Fradine, Morin, Goodacre
DORSET Coombs, Munday
NORFOLK Helsdon, Riches, Harbord, Budery
KENT Roberts, Goodacre
SUSSEX Walder, Boniface, Dinnage, Standen, Lee, Botten, Wickham, Jupp
SUFFOLK Titshall, Frost, Fairweather, Mayhew, Archer, Eade, Scarfe
DURHAM Stewart, Musgrave, Wilson, Forster
SCOTLAND Stewart in Selkirk
USA Musgrave, Saix
ESSEX Cornwell, Stock, Quilter, Lawrence, Whale, Clift
OXON Edgington, Smith, Inkpen, Snell, Batten, Brain