The IGI also has these extracted entries for the children of Thomas Callister and Mary (mother's surname not given):
MARGARET JANE CALLISTER Christening: 23 MAY 1852 Patrick, Isle Of Man
WILLIAM CALLISTER Christening: 15 JAN 1854 Patrick, Isle Of Man
JOHN JAMES CALLISTER Christening: 01 MAR 1857 Patrick, Isle Of Man
CATHARINE ELENOR COLLISTER Christening: 27 JUN 1858 Patrick, Isle of Man

If Mary Kinread/Kinrade married when she was only 17, it would have been by consent of parents/guardian. The marriage entry in the register might be worth looking at on LDS film no.0106724 [1757 - 1849] available through Family History centres worldwide. [Under "Church of Jesus Christ of Latter-Day Saints" in the local phone book.]

There are two Mary/Maria Kinrade/Kinread bapts in the IGI,Christening: 10 JUN 1826 Jurby, Father: WM KINRADE, Mother: MARY BREW, and with the same parents: Maria Christening: 05 OCT 1828 Jurby (first Mary died? - should show on the burials on the site I gave you last message).

Sue