Elizabeth Sears, "The Life and Work of William S. Heckscher: Some Petites Perceptions
," Zeitschrift für Kunstgeschichte
53.1 (1990) 107-133 (at 108, n. 5):
The most ambitious footnote in Heckscher's published work is to be found in »Melancholia (1541): An Essay in the Rhetoric of Description by Joachim Camerarius,« in Joachim Camerarius (1500-1574), ed. Frank Baron, Munich 1978. Set as an endnote in small type, note 46 extends over seven pages and is accompanied by two illustrations (92-9).