Hmmm! Interesting! 

The enumerator, on the 1911 census, has crossed out all references to Son and Daughter, and written Boarder!
1901 census says born Naples, British Subject and occupation is harpist.
In 1891 he is till in Poole:
Reference RG12, Piece 1638, Folio 133, Page 26
8 Victoria Cottages, South Road, Poole St James
Prangell, Ernest  Head  M  43  Brewers Cellarman  b Newport, Isle of Wight
Prangell, Fanny  Wife  F  34  b West Cowes
Prangell, Hilda May  Daughter  Tailoress Apprentice  b West Cowes
Prangell, Ernest Ed  Son  M  11  Scholar  b West Cowes
Prangell, Edgar Osmond  Son  M  4  Scholar  b Poole
Rogers, Joseph  Boarder  M  79  Master Mariner  b Poole
Boncone, Franciso  Boarder  M  30  Musician  b Naples, Italy