Funeral Mass for 91 year-old John Robert Gretter of Williamsburg formerly of Harper, will be held at 10:30 AM Wednesday at Holy Trinity Parish – St. Mary Catholic Church in Keota.  Burial will be at Holy Trinity Cemeteries – St. Elizabeth Cemetery in Harper. Visitation will be from 4 to 7 PM Tuesday at the church, where there will be a wake service at 4 PM. A memorial fund has been established for the Holy Trinity Parish Restoration Fund or Highland Ridge. Powell Funeral Home and Cremation Service in Keota is handling the arrangements.