Hi Torialba.I think I found them in the Census:
1871 Canadian Census, Lennox, Napanee, Ontario:
William Chaterson, age 30, b. 1841 Ont., Methodist, German descent
Sarah Chaterson, age 24, b. 1847 England, Catholic, Irish descent
Annie Chaterson, age 6, b. 1865 Ont.
Mary M. Chaterson, age 4, b. 1867 Ont.
1881 Canadian Census, Ameliasburg, Prince Edward, Ontario:
William Chatterson, age 40, b. 1841 Ont., Church of England, German Descent
Sarah Chatterson, age 36, b. 1845 England, Catholic, Irish Descent
Annie Chatterson, age 16, b. 1865 Ont.
Telda Chatterson, age 14, b. 1867 Ont.
May Chatterson, age 9, b. 1872 Ont.
Della Chatterson, age 7, b. 1874 Ont.
Martha Chatterson, age 4, b. 1877 Ont.
Ethel Chatterson, age 1, b. 1880 Ont.
1891 Canadian Census, Belleville City, West Hastings, Ontario:
William Chatterson, age 48, b. 1843 Ont., Methodist, parents b. Ontario
Sarah Chatterson, age 44, b. 1847 England, Catholic, Parents b. Ireland
May Chatterson, age 19, b. 1872 Ont.
Martha Chatterson, age 13, b. 1878 Ont.
Ethel Chatterson, age 11, b. 1880 Ont.
Cora Chatterson, age 9, b. 1882 Ont.
George Chatterson, age 2, b. 1889 Ont.
I presume you have the U.S. census info for 1900, 1910, etc.
It looks like they emigrated in 1892.
I found some birth records for the children, all born Ameliasburg, Prince Edward, Ontario:
Martha Chatterson, b. 4 Aug 1877, daughter of William H. (agent) & Sarah Fining [sic]
Ethel Etta Chatterson, b. 27 Jun 1879, daughter William H. & Sarah Fining [sic]
Peter James Chatterson, b. 16 Dec 1885, son of William H. (Fuel Dealer) & Sarah Finning
George Alford Chatterson, b. 19 Jan 1889, son of William H. (Wood Merchant) & Sarah Fleming
And one death:Sarah Chatterson, b. Ferry Point, Ameliasburg, d. 23 Sep 1877, age 2 years, 2 months, daughter of William H. & Sarah Chatterson
Hope this helps.Annie