The following quotation does not [technically] relate to the diagram: "The goal is to let the sense lines sing themselves by letting them ride on a line of breath that does not die out before the end of the thought has been reached. Imagine an arrow of breath that you are directing to that target" (Kathleen A. Harmon, The Ministry of Cantors, 2004). The diagram appears in Health in Home and Town by Bertha Millard Brown, 1912.