Thomas Rattray came of a long-established Perthshire family. He was distinguished while still a layman for his theological writings. As a liturgical and patristics scholar, and drawing on early Eastern liturgies, he exerted a decisive influence on the Scottish Communion Office of 1764, and thus on the liturgy of the Scottish Episcopal Church and, through Bishop Samuel Seabury’s influence, the liturgy of the Protestant Episcopal Church in the United States of America. Rattray was a leader among those who contended that the appointment of a bishop belonged properly to the clergy of the diocese, with the approbation of the laity. His election as Bishop of Brechin in 1727 was declared void by the College of Bishops. He was later elected Bishop of Dunkeld, and became Primus of the Scottish Episcopal Church in 1739. An example of piety and strictness of life, he was one of the most learned bishops of his time. He died in the year 1743.
from Celebrating the Saints, with amendments
O God, our heavenly Father, who raised up your faithful servant, Thomas Rattray, to be a bishop and pastor in your Church and to feed your flock: Give abundantly to all pastors the gifts of your Holy Spirit, that they may minister in your household as true servants of Christ and stewards of your divine mysteries; through Jesus Christ our Lord, who lives and reigns with you and the Holy Spirit, one God, for ever and ever. Amen.
Bishop Thomas Rattray is commemorated in the Calendar of the Scottish Episcopal Church.