In accordance with her usual custom the Church appoints a vigil to the feast of the holy apostle, Matthew. It has been kept in the Church from ancient time and it mentioned in the Martyrology of St. Jerome.
(Source: The New Roman Missal, Rev. F. X. Lasance)
St. Eustachius or Eustace, an officer of the Roman army under Emperor Trajan, was burned at the stake for the Faith, with his wife and children, during the reign of Emperor Hadrian. We pray to him to preserve us from fire, eternal or temporal. In art his is depicted with a stag and hunting equipment.