The Radcliffes wrote that Ballasloe came to the Corkills through Ann Cassin's marriage to Edward Corkill of Ballajora, and their only son James [1707-1779] inherited. When he died his eldest son Robert, with the consent of his mother and brothers Edward and James "sold" Ballasloe to John Corkill of Maughold, who they thought was a younger son of Ballasloe because James's widow Cath mentioned one of John's children as a grandchild in her 1784 will. [1784 Maughold A 158 0106229]

As we know, James also mentioned his grandsons John, Robert and Edward (all Corkill), as well as his sons Robert, James, John, and Edward in his 1779 will, which they must have missed.

They wrote: "According to the deed of sale, John paid £300 (£240 of which was owing on mortgage), a very large sum. While he may have received some capital from his wife Ann Kissag, the arrangement, which is the only one of its kind we have found, must indicate John's willingness to take responsibility for the place, rather than an actual money transaction."

The Radcliffes apparently didn't find the bapt record for James’s son John, nor mentioned James’s first wife.
They wrote that there were no children of Edward 1747-1820 (Parish Clerk) “who was a younger son of James Corkill Ballasloe and his second wife Catherine Curlett”. Edward's will: 1820 Maughold A 80 0106242.

This looks like eldest son Robert's bapt:
CORKILL Robert s/o James Corkill/ Catherine Parish Church 25 Dec 1745
And Edward's:
CORKILL Edward s/o James Corkill/ Parish Church 20 Mar 1747/48
I also didn't find James or John's bapts.

They write that from "James were descended a large number of Corkills still in Maughold in the late nineteenth century.
In Ballasloe itself, John was followed by Robert (1770-1807), Robert (1803-1870), John Robert (1825-1879) and Thomas (1859-1904) and it remained a working farm until earlier this [20th] century, but for many years now the land has been split among neighbouring farmers".

Sue