400/500mm - 17.5" (4/22/95): not seen.

600/800mm - 24" (5/30/16): at 225x; very faint, fairly small, very low even surface brightness, 24" diameter. Based on my size estimate, only the central region was seen and I missed the very low surface brightness halo. Located 4' SSW of NGC 4521. This galaxy is incorrectly identified as NGC 4512 in most modern catalogues and online sources.