Heard him read the Prophet Esaias - The eunuch, it seems, was reading aloud, and apparently in Greek, for that was the common language in Egypt; and, indeed, almost in every place it was understood. And it appears that it was the Greek version of the Septuagint that he was reading, as the quotation below is from that version.

ran thither.

Acts 8:27 And he arose and went: and, behold, a man of Ethiopia, an eunuch of great authority under Candace queen of the Ethiopians...

Psalm 119:32 I will run the way of your commandments, when you shall enlarge my heart.

Ecclesiastes 9:10 Whatever your hand finds to do, do it with your might; for there is no work, nor device, nor knowledge, nor wisdom, in the grave...

John 4:34 Jesus said to them, My meat is to do the will of him that sent me, and to finish his work.

Understandest.

Matthew 13:19,23,51 When any one hears the word of the kingdom, and understands it not, then comes the wicked one...

Matthew 15:10 And he called the multitude, and said to them, Hear, and understand:

Matthew 24:15 When you therefore shall see the abomination of desolation, spoken of by Daniel the prophet, stand in the holy place, (whoever reads...

Mark 13:14 But when you shall see the abomination of desolation, spoken of by Daniel the prophet, standing where it ought not...

Luke 24:44-45 And he said to them, These are the words which I spoke to you, while I was yet with you, that all things must be fulfilled...

John 5:39 Search the scriptures; for in them you think you have eternal life: and they are they which testify of me.

1 Corinthians 14:19 Yet in the church I had rather speak five words with my understanding, that by my voice I might teach others also...

Ephesians 5:17 Why be you not unwise, but understanding what the will of the Lord is.

Revelation 13:18 Here is wisdom. Let him that has understanding count the number of the beast: for it is the number of a man...

A Meeting in the Desert
'And the angel of the Lord spake unto Philip, saying, Arise, and go toward the south unto the way that goeth down from Jerusalem unto Gaza, which is desert. 27. And he arose and went: and, behold, a man of Ethiopia, an eunuch of great authority under Candace queen of the Ethiopians, who had the charge of all her treasure, and had come to Jerusalem for to worship, 28. Was returning, and sitting in his chariot, read Esaias the prophet. 29. Then the Spirit said unto Philip, Go near, and join thyself …
Alexander Maclaren—Expositions of Holy Scripture: The Acts

Whether the Imposition of the Priest's Hands is Necessary for this Sacrament?
Objection 1: It would seem that the imposition of the priest's hands is necessary for this sacrament. For it is written (Mk. 16:18): "They shall lay hands upon the sick, and they shall recover." Now sinners are sick spiritually, and obtain recovery through this sacrament. Therefore an imposition of hands should be made in this sacrament. Objection 2: Further, in this sacrament man regains the Holy Ghost Whom he had lost, wherefore it is said in the person of the penitent (Ps. 1:14): "Restore unto …
Saint Thomas Aquinas—Summa Theologica

Whether Penance is a Sacrament?
Objection 1: It would seem that Penance is not a sacrament. For Gregory [*Cf. Isidore, Etym. vi, ch. 19] says: "The sacraments are Baptism, Chrism, and the Body and Blood of Christ; which are called sacraments because under the veil of corporeal things the Divine power works out salvation in a hidden manner." But this does not happen in Penance, because therein corporeal things are not employed that, under them, the power of God may work our salvation. Therefore Penance is not a sacrament. Objection …
Saint Thomas Aquinas—Summa Theologica