This is a possibility to be your Robert Corkill, blacksmith (from Tom Corteen's records):

1861 census:
1 76 Cott on Dreemskerry Robert CORKILL Head MAR 41 Blacksmith Maughold
1 76 Cott on Dreemskerry Catherine CORKILL Wife MAR 42 Bride
1 76 Cott on Dreemskerry Esther CORKILL Daughter UNM 19 Servant maid Maughold
1 76 Cott on Dreemskerry Robert CORKILL Son UNM 17 Blacksmith Maughold
1 76 Cott on Dreemskerry Catherine CORKILL Daughter UNM 16 Maughold
1 76 Cott on Dreemskerry John CORKILL Son UNM 12 Scholar Maughold
1 76 Cott on Dreemskerry Ann CORKILL Daughter UNM 9 Maughold
1 76 Cott on Dreemskerry Eleanor CORKILL Daughter UNM 7 Maughold
1 76 Cott on Dreemskerry Edward CORKILL Son UNM 4 Maughold
1 76 Cott on Dreemskerry Isabella Margaret CORKILL Daughter UNM 1 Maughold.

Robert Corkill & Catharine QUAYLE married in Maughold 3 Aug 1839.

But beware - this is far from definite. There were a lot of Robert Corkills b.c.1844 in the IOM, and a lot of Corkill blacksmiths.

Sue