Fonds consists of Aemilius Irving's records relating to his role as counsel for the Ontario government during disputes with the federal government. Included are: correspondence, notes, drafts, clippings, financial schedules and statements, telegrams, some printed court records, transcripts, evidence collected to support the Ontario position in the arbitration proceedings, typed transcripts of the proceedings of arbitration between Canada and the provinces of Quebec and Ontario, printed copies of court documents, copies of printed government records and publications, and copies of court cases unrelated to the arbitration. Fonds also contains blotter copy letterbooks of Aemilius Irving. Fonds has, for the most part, been kept in its original arrangement, which consisted of the arrangement of records into consecutively numbered packages, with each package containing records relating to a particular subject or court action.

For a more detailed description, use this link to the Archives of Ontario's descriptive database: http://ao.minisisinc.com/scripts/mwimain.dll/144/PROV/PROV/REFD+F+1027?SESSIONSEARCH