Consists of letter from Kenneth Mackenzie possibly to Roderick's son Ensign John Mackenzie.

Consists of letter from James McKenzie to Roderick’s son John McKenzie on board the Elora, giving John instructions to take Mr. Macdonell's furs to Mr. Burns at Quebec.

File includes a kept copy of a letter to Colonel Yorke.

File includes kept copy of a letter an unknown recipient, unsigned, in R. Mackenzie's hand. Gives news of recent disturbances at Terrebonne in the month of November, and discusses the Rebellion in general.

File contains three documents relating to the legacy of Simon McTavish, including: a memorial of Simon McTavish addressed to the Lieut. Gov. of Lower Canada (Robert Shore Milnes); the Last Will and Testament of Simon McTavish (copy produced on or after 1807); and a document containing five points respecting the Last Will and Testament of the late Simon McTavish submitted to the opinion of counsel (the document is a copy prepared by John Fraser).

File includes a memorandum on the Seigneury of Terrebonne, with a letter and four letter transcripts addressed to Roderick Mackenzie. The memorandum reads: "Memorandum respecting the Seigniory of Terrebonne informing proprietors to apply to Mr. Plante to determine the amount of taxes owed on the third concession of the Seigniory, noting that the amount due should be increased from what was previously paid by Mr. Jordan." Also included is a letter concerning the sale of the seigneury of Terrebonne to Mackenzie and later annulment and 4 transcripts of letters from Reid to Mackenzie regarding the seigneury of Terrebonne dating from 12 August 12 1816 to 19 February 19 1819.

File includes a letter from Isaac Todd to Mackenzie, Oldham & Co. Todd relays the request from Mr. Morrogh to send a bill for a shipment received in June of 500 barrels.

Consists of letter from Roderick Mackenzie to Henry McKenzie.

Includes a notarized agreement (1808) between Simon Fraser and Roderick Mackenzie for building a house at Terrebonne and a second notarized agreement regarding an expedition (1809).

Consists of marriage settlement between Roderick Mackenzie and Rachel Chaboillez and other documents pertaining to the life of Roderick Mackenzie, including notes, correspondence, transcription of document, photocopies of original material, photographs and manuscript documents relating to genealogy and to the Seignery of Terrebonne, etc.