Averil, Obviously you did not read the link that I included otherwise you would not be using the term "Heir-ship Bargain" nor would you be attributing that sentence to me. I didn't make i up, that is exactly the way it was written in the Manx Notebook document.
I tried searching the IOM Notebook site for the term "Heir-ship Bargain" and absolutely nothing came up. Funny its not a term found anywhere in any of those old transcribed wills, lease transfers, sales, etc. which are located there on the Notebook site. In fact the word "Heir-ship" only appears twice when you do a search. Another search using the word "Heirship" does appear in a lot of hits, but not in the context that you want to use it. Counting heads like you are doing is pretty meaningless from what I read.
Show us the document where Daniel transferred Gob ny Scoote to his son John, because Daniel and his wife did not mention the transfer of any property in their (joint) will. Daniel and his wife, had earlier sold Crow Creen to their son, Robert in 26 Dec.1821 (North Side Sale 1823 #42).
Since you are so adamant that Daniel and his wife passed Gob ny Scoote to their son John, in lieu of his brother John, then show us a document. We know your position, now please point us to some proof.