The bulk of the collection contains correspondence received by American medievalist Bryce Lyon. The correspondents are primarily scholars based in Belgium, but there are others with addresses from the United States and the United Kingdom. The topics of the correspondence relate to Lyon's research on aspects of the social and economic histories of the Low Countries and England during the medieval period, but include personal exchanges, as well.

Galbraith Letters collection. December 7, no year provided. On paper. 1 page.

Galbraith Letters collection. On paper. 1 page, front and back.

Galbraith Letters collection. October 29, no year provided. On paper. 1 page.

Galbraith Letters collection. October 17, no year provided. On paper. Mount Holyoke College seal. 1 page.

Sayles Letters collection. No date provided. Card printed in Germany. Graf Kraft Von Toggenburg label. Handwritten note on backside.

Sayles Letters collection. No date provided. Christmas card. Written by George and Agnes. Handwritten note on inside.

Sayles Letters collection. Letter on stationary. New York University, Graduate School of Arts and Science letterhead. Sent from Fifth Avenue Hotel, New York, USA. 1 page, front and back.

Sayles Letters collection. Letter on stationary. New York University, Interdepartmental Communication letterhead. Sent from Warren Hill, Crowborough, Sussex, England. 1 page, front and back.

Sayles Letters collection. Letter on paper. Sent from Warren Hill, Crowborough, Sussex, England. To Bryce and Mary. Half a page, front and back. Handwritten editing.