"This is Beethoven's autograph, but represents the first writing-out of the arietta, with many alterations. Subsequently Beethoven must have written out another version for publication (since the published version differs considerably from the Stanford autograph)..."--letter from Alan Tyson, April 12, 1968 inserted in the Catalogue of the Memorial Library of Music, 1950.
Bound with: In questa tomba oscura : arietta con accompagnamento di piano forte composta in diverse maniere da molti autori. Vienna : T. Mollo, . 9692470
Kinsky, page 596.
Van Patten, N. Catalogue of the Memorial Library of Music, page 14.