The collection consists primarily of letters, most of them sent by Samuel Peters, an Anglican clergyman in Connecticut with Loyalist sympathies, to Samuel Harrison, relating to the claim of the heirs of Jonathan Carver to the Carver land grant; letters from S. R. Holt, Worthington, Ohio, relating to the discovery in Ross County, Ohio, of a copy of the deed granted Jonathan Carver by the Dakota chiefs; and miscellaneous papers. There is information about efforts to locate the original deed, deeds granted to others by Jonathan Carver and his heirs, the expenses of the Carver heirs in putting petitions before Congress in an attempt to get the Carver Grant confirmed by that body, machinations against the Carver heirs, and plans for expeditions to meet the Dakota Indians on behalf of the Carver claim. One of the letters suggests that Samuel Peters and Samuel Harrison were cousins.

Later materials include letters from Philadelphia attorney James B. Laux to Henry C. Harrison concerning Carver grant lands that were subsequently deeded by the Carver heirs to Samuel Peters and by him to John Polhemus McCarr and his wife, and letters from S. R. Holt of Worthington, Ohio, concerning the discovery in that state of a transcription of the 1767 Carver Grant deed.