Complex sentence: Judging by the decoration he considered that the south doorway dated from the late 13th or early 14th century; he noted that the 12th-century font had an ornamental design similar to other fonts elsewhere in Anglesey.
Split into simpler sentences: Judging by the decoration he considered that the south doorway dated from the late 13th or early 14th century. He also noted that the 12th-century font had an ornamental design similar to other fonts elsewhere in Anglesey.