Cannonmn, We agree with Lance; it's a great link. We believe that you have only 1/2 a cannon there on the one which is has a 6" bore with sides 5" thick and was rolling in the surf for years and years and recently mounted in a wooden crib mount.
Lance, It's all well and good that you have all these resources which would make a night soil collector take notice, but what everyone here wants to know, member and guest alike, is
WILL YOU BE TASTING THE SOIL??? He, he, he, he.............
Your
FRIENDS at Seacoast Artillery,
Tracy and Mike