they are on 1881 censuswww.familysearch.org
There is a John and Sarah A Peacy on the 1881 census living with Levi Peacy. I don't think these are your guys . It doesn't say they are married but they are the only ones on the census.
1901 census can be viewed on www.automatedgenealogy.com
Joseph Levi Hubble, 26, born Seymour, living Belmont, farmer , s/o Henry and Hannah Hubble married Christina BANNON, 22, born Belmont, living same, d/o Robert Bannon & Dinah Ryan, witn: David Bentley and Jane Gillen of Marmora on June 3, 1885 at Marmora
George McMillan, blacksmith, born Havelock ,living same s/o Abram McMillan and Isabella Bannon, married Alberta M Gummon, 27, Fenella, Harwood,d/o William Gummon & Maggie Johnston, wit: M? L Johnson & Bella Frost , both of Havelock on 18 Jan 1905 at Havelock (Peterborough) #016099-05
017419-74 (Peterborough) PEACY, Dinah Jane, f, born Mar 13 1873, father: John Peacy , farmer, mother: Sarah J Bannon, inf: John Peacy , Belmont Tp
Could not find a Dinah Peacy on 1881 census.