Glossolalia (Speaking in Tongues) in Early Church History - Quotes from Eusebius, Novatian, and Tertullian

Eusebius Pamphilius (c. AD 263 – 339): Church History, Life of Constantine, Oration in Praise of Constantine Chapter VII
Quotes Irenæus (AD 140-203)
6. And in another place the same author [Irenæus] writes:
“As also we hear that many brethren in the Church possess prophetic gifts, and speak, through the Spirit, with all kinds of tongues, and bring to light the secret things of men for their good, and declare the mysteries of God.”

Novatian (210-280): Treatise Concerning the Trinity. Chapter 29.
This is He who places prophets in the Church, instructs teachers, directs tongues, gives powers and healings, does wonderful works, offers discrimination of spirits, affords powers of government, suggests counsels, and orders and arranges whatever other gifts there are of charismata; and thus make the Lord’s Church everywhere, and in all, perfected and completed.

Tertullian (c. 160 – c. 225 AD): Against Marcion, Book V, Chapter 8.
Let Marcion then exhibit, as gifts of his god, some prophets, such as have not spoken by human sense, but with the Spirit of God, such as have both predicted things to come, and have made manifest the secrets of the heart; let him produce a psalm, a vision, a prayer -- only let it be by the Spirit, in an ecstasy, that is, in a rapture, whenever an interpretation of tongues has occurred to him; let him show to me also, that any woman of boastful tongue in his community has ever prophesied from amongst those specially holy sisters of his. Now all these signs (of spiritual gifts) are forthcoming from my side without any difficulty, and they agree, too, with the rules, and the dispensations, and the instructions of the Creator; therefore without doubt the Christ, and the Spirit, and the apostle, belong severally to my God. Here, then, is my frank avowal for any one who cares to require it.