Lord (kurie). Cornelius recognizes the angel of God (Act 10:3) as God’s messenger.
Are gone up (anebēsan). Timeless second aorist active indicative of anabainō. Gone up like the smoke of incense in sacrifices.
For a memorial (eis mnēmosunon). Old word from mnēmōn. The only other instance in the N.T. is by Jesus about the act of Mary of Bethany (Mat 26:13; Mar 14:9). His prayers and his alms proved his sincerity and won the ear of God.