Calvin on the Validity of “Romish” Baptism

Of course, Christian baptism can indeed be administered irregularly.   Thus, a baby may irregularly be submerged three times — by an Anti-Protestant Greek 'Orthodox' priest.   Or an adult may be baptized trinitarianly with an irregular sevenfold submersion — by a maverick, noisy & enthusiastic yet insufficiently informed Ultra-Pentecostalist.   Again, a perfectly valid (though highly irregular) baptism might be performed by an immersionistic 'Plymouth Brethren' layman — or by an ordained Campbellite or 'Church of Christ' clergywoman.