My impression is that Ascension did not always have an octave. Cranmer wrote his own collect for the Sunday after Ascension, basing it on a song that the Venerable Bede is supposed to have sung on his deathbed. Here are both collects for Ascension.
Grant, we beseech thee, Almighty God, that like as we do believe thy only begotten Son our Lord Jesus Christ to have ascended into the heavens; so we may also in heart and mind thither ascend, and with him continually dwell, who liveth and reigneth with thee and the Holy Ghost, one God, world without end. Amen.
O God, the King of glory, who hast exalted thine only Son Jesus Christ with great triumph unto thy kingdom in heaven; We beseech thee, leave us not comfortless; but send to us thine Holy Ghost to comfort us, and exalt us unto the same place whither our Saviour Christ is gone before, who liveth and reigneth with thee and the same Holy Ghost, one God, world without end. Amen.
P.S. On a mundane note, and in case anyone else has this problem, I figured out how to turn on "sent items" in Yahoo mail. George was no help. The relevant thing to click is hidden over in mail options.