Hello Dazz,

The IGI on Familysearch.org has a baptism for Humphrey CALLISTER on 24 MAR 1837 Jurby, Isle Of Man, Father: JOHN CALLISTER, Mother: ELIZA MYLCHREEST. This is an "extracted" record (from the parish register) - ignore the submitted records which are unreliable.

The source - the parish register - is on film no.0106725 which you can order to view through LDS Family History Centres worldwide, to build up bapt/marr/burials of earlier family members. See "Church of Jesus Christ of Latter-Day Saints" in the local phone book. Open to all.

You can use the online IGI to find siblings (fill in father's name, mother's name, plus event (birth/christening), region and country, but nothing else.
Also useful to have the index entries from the IGI for earlier bapts and marriages when searching the par reg film.

Sue