Andrew Cooper
May 23, 2014    Hale Pohaku, HI (map)
46cm f/4.5 Newtonian, Deep Violet @ 175x
Seeing: 7 Transparency: 7 Moon: 0%

Large, about 20' in diameter, less dark and less defined conpared to B93 just 20' east, quite a few stars scattered across the area while devoid of the fainter stars that form the rich galactic starfield surrounding

Andrew Cooper
Aug 30, 2008    Hale Pohaku (map)
76mm APO
Transparency: 7.5

A dark knot on the edge of the M24 star cloud, very dark with no stars visible in the central area, edges not distinct, but growing dark rapidly at the perimeter, small at ½° across

Andrew Cooper
May 28, 2006    Gila, NM (map)
46cm f/4.5 Deep Violet

Good dark void in a very thick galactic star field, a nearly starless area about 15' in diameter with two stars noted against it, a little larger N-S with an extension off the NW corner to the west, similar in size and opacity to the nearby B93 located 20' east

Rev. T.W. Webb
May 19, 1885    Hardwick, Herefordshire, England (map)

Barnard has found several objects which he believes to be due to an absorption medium, one at 18h7m, S. 18°15' especially remarkable.

― Celestial Objects for Common Telescopes, T. W. Webb, 1917

E.E. Barnard
25cm f/5 Astrograph

Black spot, 15' N and S, 9' E and W. This black spot, known to me in my early days of comet seeking, is very sharply defined on its east edge but less definite on the west. There is a twelfth-magnitude star near the middle with several other small stars (see ibid., 38, 496, 1913, Plate XX, for an account of this remarkable object)."

― A Photographic Atlas of Selected Regions of the Milky Way, E.E. Barnard, 1927