Statistics for occurrence #1 of “Cal.” in chapter 6 of Comte de Paris, History of the Civil War in America. Vol. 3.:

...f the States to which these regiments belonged would occupy considerable space, we have adopted the official abbreviations, the key to which we append here: Alabama,Ala. Arkansas,Ark. California, Cal. North Carolina,N. C. South Carolina,S. C. Connecticut,Conn. Delaware,Del. Florida,Fla. Georgia,Ga. Illinois,Ill. Indiana,Ind. Iowa,Ia. Kansas,Kan. Kentucky,Ky. Louisiana,La. Maine,Me. M...
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