Perhaps these are your folks:

1871, Malew, district 4, schedule 47, 5 Close Clark
John Cain, head, married, 30, lead miner, Malew
Jane, wife, married, 33, Malew
Ann J, daughter, 7, scholar, Malew
Christian, daughter, 4, scholar, Malew
John, son, 2 months, Malew
Christian, mother, widow, 70, agricultural labourer, Marown,

1881 Census Malew
, M5, 3, 13, CAIN, John, Ballaylay, Head, Widower, 39, Farmer & Lead Miner, Marown
, M5, 3, 13, CAIN, John, Ballaylay, Son, , 10, Scholar, Malew
, M5, 3, 13, CAIN, Thomas, Ballaylay, Son, , 2/12, , Malew
, M5, 3, 13, CAIN, Ann, Ballaylay, Daughter, , 17, Dressmaker, Malew
, M5, 4, 13, CAIN, Christian, Ballaylay, Daughter, , 14, Scholar, Malew
, M5, 4, 13, CAIN, Fanny, Ballaylay, Daughter, , 7, Scholar, Malew
, M5, 4, 13, CAIN, Louisa, Ballaylay, Daughter, , 5, Scholar, Malew
, M5, 4, 13, CAIN, Eliza, Ballaylay, Daughter, , 3, , Malew

Marown Burial Register
Jane Caine Malew age 35 yrs buried 29 Jan 1881
John Caine Close Clark Malew age 67 yrs buried 4 Oct 1907