Musical cryptogram. A musical cryptogram is a cryptogrammatic sequence of musical notes, a sequence which can be taken to refer to an extra-musical text by some 'logical' relationship, usually between note names and letters.
Rockbridge is an unincorporated community in northern Ozark County, Missouri. It is the site of an old mill on spring fed Spring Creek a tributary of Bryant Creek, which still houses the post office. It is twelve miles north of Gainesville on State Route N about one and a half miles north of Route 95. The narrow valley floor is only about 650 feet wide and at an elevation of 770 feet and the Ozark ridges on either side are 200 to 250 feet higher.
Rockbridge (population 189) is located in lower western / southwestern Illinois in the southeastern corner of Greene County. Illinois Route 267 is the main roadway traveling through Rockbridge as Illinois Route 108 passes by town two and a half miles to the north. County Highway 24 also passes through the village. Rockbridge is located about 35 miles southwest of Springfield and 15 miles north of Alton. A post office named Rockbridge was established in the area in 1850. The town was established in 1870 along the Rockford, Rock Island & St. Louis Railroad line.