From Dom Guéranger's The Liturgical Year.
According to the most ancient monuments of the Roman Church,[1] another saint has always been honoured on this same day, viz: Hermes, a Roman magistrate, who bore witness to Christ under Trajan. The crypt constructed, less than half a century after the death of the apostles, to receive this martyr’s relics, is remarkable for its majestic and ample proportions not usually found in the subterranean cemeteries. It was his sister Theodora, who received from Balbina, daughter of the tribune Quirinus, the venerable chains of St. Peter.
Prayer
Deus, qui beatum Hermetem, martyrem tuum, virtute constantiæ in passione roborasti: ex ejus nobis imitatione tribue, pro amore tuo prospera mundi despicere, et nulla ejus ad versa formidare. Per Dominum.
O God, who didst strengthen blessed Hermes, thy martyr, with the virtue of constancy in suffering: grant us in imitation of him to despise worldly prosperity for the love of thee, and not to fear any of its adversity. Through our Lord, &c.
[1] Calendarium Bucherii.