Scouts' Signals Small 320×97 Medium 640×194 Large 1024×311 Download Tiff Original 2400×728 | (328.8 KB) Description The complete alphabet of the Boy Scouts' signal code. Keywords alphabet of signal flags, boy scout code, boy scout signs, visual signals Galleries Complete Alphabets Source: Ellsworth D. Foster ed. The American Educator (vol. 7) (Chicago, IL: Ralph Durham Company, 1921)