The Teubner edition of Festus de Verborum Significatu had scarcely appeared when Professor Anspach announced (in the Deutsche Literaturzeitung of November 29, 1913) his discovery of a MS. of Isidore's Etymologies (A 18 of the Vallicelli Library, Rome) with some Scholia taken from Festus. Last Easter, in the limited time at my disposal, I transcribed from the MS. the greater part of this Isidore Commentary and, later, received a transcript of the remainder from Abbe Liebaert some weeks before his death. Although hampered by the deficiencies of our University Library, I am unwilling to keep this new evidence any longer from students of Festus.