Note to King Lear, 1.1.5-7

King Lear,
Act 1, Scene 1, line 5
equalities are so weighed, that curiosity in neither can make choice of either's moiety: equivalences [in the parcels assigned to the two dukes] are so balanced that close examination would not lead either one of them to choose the portion of the other one.

—Later in the scene King Lear says that the daughter who loves him most will receive the largest share of land, but this passage shows that Gloucester believes King Lear has already planned the division of his kingdom, and that he has treated the Duke of Albany (husband to Lear's eldest daughter, Goneril) and the Duke of Cornwall (husband to Lear's second daughter, Regan) exactly the same.