"Series B." The trade wind charts were released as series B a part of Maury's "Wind and current charts", series A-F. Two sheets were produced, one for the Atlantic and the other for the Indian Ocean. For complete discussion, see "The wind and current chart series produced by Matthew Fontaine Maury," by Marc I. Pinsel, in Navigation : Journal of the Institute of Navigation, v. 28, no. 2 (Summer, 1981), p. 123-137. Includes notes.