When he returned to Baltimore , he took his chair in the Church of St. Peter , which would serve as his pro-cathedral .
Carroll was invested in his office at the parish of St. Thomas Manor in Charles County , Maryland .
When Carroll returned to Baltimore , Carroll took Carroll 's chair in the Church of St. Peter , which would serve as his pro-cathedral .
Carroll was invested in his office at the parish of St. Thomas Manor in Charles County , Maryland .