Contains [published volumes] "Acts and Proceedings ...of the General Assembly of the Presbyterian Church in Canada, for the years 1897 and 1901 through 1925, which include proceedings of the General Assembly, reports of various church bodies, statistical information and the Rolls of Synods and Presbyteries which provide the names of ministers and elders for congregations.

Consists of minutes, circulars, publications, extracts and other documents, largely from and/or related to the [Presbyterian] Committee on Church Union and the topic of Church Union, more generally.

Consists of publications of the Presbyterian Church Association, which was a group of clergy and laymen opposed to the organic union of the Presbyterian Church with other churches. Series also includes materials published by other individuals, groups, or churches who were opposed to union (though some of the individuals may have been members of the Association). Publications other than those of the Association have been listed separately and the author and publisher identified where possible.

Consists of various articles and other documents, relating to the Presbyterian Church in Canada and meetings of its committees, boards, synods and other internal organizations.