[BIBLIOGRAPHY]. SAUER, Gordon C. (1947-1991). John Gould the Bird Man: Correspondence. Vols. I-IV: Kansas City, MO: Privately printed, 1998. Vol. IV: Mansfield Centre, CT: Martino Publishing, 2006. 5 volumes, various 4to and 8vo sizes (vol. IV slightly larger, vol. V slightly smaller). Illustrated. Publisher's gilt-lettered cloth. LIMITED EDITION, one of 400 unnumbered copies. PRESENTATION COPY, INSCRIBED BY GOULD to his children in volumes I-III.