interestedness

Now that Roxalanne came to entreat him to do that which already he saw himself forced to do, he turned his attention to the profit that he might derive from her interestedness on my behalf.

From Bardelys the Magnificent; being an account of the strange wooing pursued by the Sieur Marcel de Saint-Pol, marquis of Bardelys... by Rafael Sabatini

I think it was the clearness and understanding in them, and a sort of great interestedness.

From The White People by Frances Hodgson Burnett

I might give them what degree of credit I pleased; and take them with abatement for Mr. Solmes's interestedness, if I thought fit.

From Clarissa Harlowe; or the history of a young lady — Volume 2 by Samuel Richardson

"Take into account the skill of forgers and the interestedness of apologists and calumniators."

From Bouvard and Pécuchet A Tragi-comic Novel of Bourgeois Life by Gustave Flaubert

We are told that Matthew Arnold combined all the characteristics of good conversation—politeness, vivacity, sympathy, interestedness, geniality, a happy choice of words, and a never-failing humor.

From Talks on Talking by Grenville Kleiser