Helen and Benjamin were in Lot 8 in the 1921 census, with Stanley, Charles, Atwood and Alice. Benjamin was a fisherman.
According to Helen's obituary, in the Summerside Journal 1934, she died at home in Greenhill on Friday, June 22. She was survived by her husband, three daughters (Alice, Jessie and Edith) and five sons (Stanley, Charles, Atwood, Edsyle and Boyd), her brothers Stanley and John MacDonald of West Point; and her three sisters: Mrs. Samuel Smith, West Point; Mrs. Charles MacWilliams, Errol, N.H., and Mrs. Gerald Currie in Western Canada.
from the Dunville website:
WIFE: Helen Isabelle MacDonald (1890-1934), married: (1)
father: William MacDonald (b 29 August 1846)
mother: Maria MacDonald née Dyment (b 27 March 1853)
born: 13 March 1890 or 20 November 1890
died: 23 June 1934
children:
William John Leigh Dumville (b 7 January 1913 in Prince Edward Island, died 7 June 1913)
Benjamin Stanley Dumville (b 22 March 1914 in Prince Edward Island, married Elizabeth (Bessie) Isabelle Boulter)
Charles Burrough Dumville (b 21 March 1916 in Prince Edward Island, married Jean Millicent Hart)
Alice Ann Dumville (b 7 May 1918 in Prince Edward Island, married James Ray Kennedy)
Henry Atwood Dunville (b 13 April 1921 in Prince Edward Island, married Evelyn Ann Banister)
Jessie Isabelle Dumville (b 20 May 1923 in Prince Edward Island, married George Raymond Noonan)
Edsel Ford Dumville (b 23 October 1925 in Prince Edward Island, married Mary Thelma MacNevin)
Eva Kutura Dumville (b 27 December 1927 in Prince Edward Island, married Brenton Spencer MacDonald)
Ernest Earl Boyd Dumville (b 27 October 1930 in Prince Edward Island, married Georgina (Georgie) Henderson)
In the 1928 Cummings Atlas of PEI, the children were Stanley, Charlie, Alice, Atwood, and Jessie.