If you want to know about the company named in the return address (Myers & Carrington):

Transcribed as follows:
Quote:
"Otis M. Carrington is best remembered as one of the world's foremost operettas for children. In 1912, Mr. Carrington wrote "The Windmills of Holland" It was the first of more than forty operettas to come from his hand, and led American music critics like Harold Rogers of the Christian Science Moniter to call him "The leader of the operetta field of educational music."
Mr. Carrington joined the teaching staff of Sequoia High School in 1907 as the art and music instructor, and went on to head the school's music department he developed (with its famous choral programs, including The Treble Clef.) Teaching an unprecedented 43 years. Between 1923 and 1945 student productions of his operetta were fare at Sequoia High School and at Redwood City Elementary Schools. Sequoia was the testing ground for his work. Carrington and B.E. Myers, an instructor in the commercial arts department at Sequoia, published and distributed the work as Myers and Carrington , school operettas. The success of these children's operettas is evidenced by their over 25 presentations worldwide."