Chapter Circular, 1883
By the time this 1883 letter to alumni is distributed, an association, called the "Cornell Delta Upsilon Association," had been formed. Later on, the association was reorganized and renamed, with the addition of "Alumni" before "Association."
The letter also broaches the subject of raising funds to construct a chapter house.
Page 2, Chapter Circular, 1883
Page 3, Chapter Circular 1883