Royal - A regal-looking shield was issued by Royal Insurance Co. in 1845.
	Pennsylvania Insurance Co. - One of the smallest (and brightest) of the fire marks, issued by Pennsylvania Insurance Co.
	New Castle - An 1849 mark of the New Castle Mutual Insurance Co.
	Tree - Because of Ben Franklin's theory that trees attracted lightening, causing fires to spread and hampered fire fighting equipment, insurance companies used to refuse to issue policies for buildings surrounded by trees. The tree fire mark, issued in 1784 by the 40 members of the Philadelphia Contributorship which split off and formed the Mutual Assurance of Philadelphia symbolized their opposition to the accepted belief of the day.
	Sun - Fire mark of unknown origin indicated the policy number on small plaque at the bottom.