The fonds contains the company's business correspondence related to the importation of food products, essences, and spices from international manufacturers, and other business expenditures, as well as some correspondence with government regulators regarding food labeling and quality. In addition, some letters are from charitable and cultural organizations to which the company donated. Some personal correspondence of Henri Jonas is included, as well as numerous restaurant bills and and menus, including for the Montreal Hunt Club.

Chiefly found is incoming correspondence with product suppliers and invoices for various services, including car repair, advertising, stationary, funeral arrangements, and photography. Suppliers include companies from France, Germany, Norway, UK, Italy, Sicily, Hungary, China, India, and Spain. Products include essential oils, soaps and luxury food products such as sardines, truffles, preserves, jam, Hungarian paprika, Chinese tea, olive oil, caviar, liqueurs, foie gras, sardines, and ketchup. Two Montreal-area manufacturers are represented, with a catalogue from Couvrette Sauriol Limitée (1937) and a brochure for the Stuart Brothers. Included is one letter from postwar France soliciting renewed a commercial relationship following the allied victory (Royal Champignon). There are also bulletins from and correspondence with, including one outgoing letter, the Canadian Department of Agriculture regarding quality and labelling of canned fruits and vegetables.

A few letters are personal in nature and addressed to Henri Jonas himself. There are also telegrams and letters from Canadian organizations such as the Pacific Railway Company, and Canadian societies and organizations to which the company donated money (Canadian Society for the Prevention of Cruelty to Animals, Montreal Orchestra, Hospital for Sick Children London, Salvation Army, McGill University Centennial Endowment).

Some of the company's advertising materials are also found, as well as food labels for products including mushrooms, wine, truffles, olive oil, sardines, and lemonade).

Collection consists of three items relating to Saint Helen's Island (Île Sainte-Hélène), located southeast of the Island of Montreal in the Saint Lawrence River. The items relate to the island's military installations, built as defenses for the city of Montreal as a result of the War of 1812 and used as a munitions depot for the British Army and later a garrison, arsenal, and military prison operated by the Canadian Army. Items include a manuscript entitled, "Military Defences. St. Helen's Island - Barons of Longeuil," written by Charles Walkem, August, 1873; "Plan of Isle St. Helens," an undated map on linen paper, with a key pointing out the military installations; and "The Fort, St. Helen's Island," a 4-page pamphlet containing schematics and descriptions of the island's fort as well as a history of the island dating from 1611 to the 1960s. The pamphlet cover photograph features a soldier of the Royal Artillery, Saint Helen's Island Fort, circa 1865. Part of the manuscript document also deals with the hereditary Barony of Longueuil.

Two copies of a typed list of the characters and list of scenes for "The Miller and his Men" by Isaac Pocock, with 8 colour scenes from "Webb's Scenes in the Miller and his Men" (no. 2, 5-11). The typed lists attribute scenery and costumes to W. Webb, "late of 146 Old Street, St. Luke's."

Printed booklet of play: The Miller and his Men. Published by B. Pollock, Hoxton Street, London.

Envelope with handwritten notes regarding a deed of sale from T. Whyte and Jules Leblanc

Notice of lawyer's fees due following legal case of G. Poirier against A. Dawes.

Dockworkers pay list.

Inventory of furniture, bedding and wares aboard steamers.

File contains one bound notebook whereon John McDonald has written notes and a brief history about his life and work. This volume comprises pages 113-226 covering the years 1806-1816.