Complex sentence: Once again Sir William's enthusiasm for heraldry finds its place, for the grounds of the panels formed by the ribs are decorated with lions (Fairfax coat), and goats and talbots (the Fairfax and Stapleton supporters).
Split into simpler sentences: Once again Sir William's enthusiasm for heraldry finds its place. For the grounds of the panels formed by the ribs are decorated with lions (Fairfax coat), and goats and talbots (the Fairfax and Stapleton supporters).