The gallant commander of the ninth Massachusetts regiment died at his residence in Boston, Saturday morning, from injuries received in the battle of July 1st. Col. Cass was an old resident of Boston, an old member of the volunteer militia, and his position and popular qualities gave him great influence among his Irish fellow-citizens. When the war broke out he immediately tendered his services towards raising the regiment which he has since commanded. The regiment has done noble service, and has met with fearful losses. Officers and privates who knew no fear, and no other place of duty that that of danger, have fallen like leaves before an untimely storm.