Complex sentence: Dr. Robert Witham of Douay wrote observations on this work, and denounced it at Rome, his principal complaint being that Fell had taken his "Lives" chiefly from Bachlet, and had recorded few miracles.
Split into simpler sentences: Dr. Robert Witham of Douay wrote observations on this work, and denounced it at Rome. Witham's principal complaint was that Fell had taken his "Lives" chiefly from Bachlet, and had recorded few miracles.