Complex sentence: Thomas was the third son of Thomas Mellor of Ashton-under-Lyne, Lancashire, and his wife Mary Walton of Stalybridge, Cheshire he was christened on 30 October 1814 at the parish church of St Michael Ashton-under-Lyne.
Split into simpler sentences: Thomas was the third son of Thomas Mellor of Ashton-under-Lyne, Lancashire, and his wife Mary Walton of Stalybridge, Cheshire. He was christened on 30 October 1814 at the parish church of St Michael Ashton-under-Lyne.