1891 Census of PEI shows as following
Malcom 64 Lot 32 J2
Catherine 60
Kate 38
Catherine 37
Donald 30
Eliza 28
Donald H. 25
Katie 23
Alice A. 17I believe this Donald H. was b-PEI married-NB d-Maine
He is not listed in 1901 in PEI, nor NB
living in Perth in 1891