Now at the Lamb's high royal feast. By E. Caswall, in his Lyra Catholica, 1849, p. 94, and again in his Hymns and Poems, 1873, p. 53, in 7 stanzas of 4 lines. This is the translation usually found in Roman Catholic hymn-books. An altered form of this in 4 stanzas is No. 52 in the Irvingite Hymns for the Use of the Churches, 1864, beginning "Guests at the banquet of the Lamb."
[A translation of Ad regias Agni dapes.]
-- Excerpts from John Julian, Dictionary of Hymnology (1907)