What is the main conflict in The Warden by Anthony Trollope?

The main conflict in the novel, The Warden, revolves around what is believed by many to be the unfair division and interpretation of John Hiram's will and the property spoken of therein.

Murmurs, very slight murmurs, had been heard in Barchester,—few indeed, and far between,—that the proceeds of John Hiram's property had not been fairly divided: but they can hardly be said to have been of such a nature as to have caused uneasiness to anyone: still the thing had been whispered, and Mr Harding had heard it.