1834 S. Cooper (ed. 4) I. 649 The discharge is sometimes inky-black.
1874 F. G. D. Bedford iv. 69 Small inky-looking clouds foretell rain.
1891 M. C. Cooke vi. 47 The ‘Inky Mushroom’ (Coprinus atramentarius) received that name because, when it becomes old, the gills melt away into a thick, black, inky fluid, which may be used as ink.]