We recently had the opportunity to examine a manuscript of Johann Sebastian Bach under a microscope capable of capturing images. Fascinating details emerge at high magnification, revealing individual ink particles in the middle image, and the densely woven network of paper fibers visible below.
Bach, Johann Sebastian, 1685-1750. Canon a 4 voc: perpetuo. A.MS.s.; Weimar, 2 Aug 1713.
MS Eng 870 (35B)
Houghton Library, Harvard University