Charles Messier discovered Messier 58, along with the elliptical galaxies Messier 59 and Messier 60, on April 15, 1779.
It [Messier 66] was discovered by French astronomer Charles Messier on 1 March 1780, who described it as “very long and very faint”.
It [Messier 92] was inadvertently rediscovered by Charles Messier on March 18, 1781, and added as the 92nd entry in his catalogue.
Some beds in the [Renton] formation are very soft and plastic when wet, owing to the weathering or alteration of feldspar to a montmorillonitic clay.