Lewis Swift discovered NGC 6084 = Sw. III-92 on 6 Jun 1886 and logged "eeeF, pS, R, eee diff." There is nothing at his position, but 1.1 minutes east is UGC 10291 (same declination), the only nearby candidate. Assuming this is Swift's object, it's odd he didn't mention the bright mag 10 star close southwest.

400/500mm - 17.5" very faint, very small, slightly elongated SW-NE, small faint nucleus. A mag 14 star is 39" WNW of center. Located just 1.9' NE of a mag 10 star.

Notes by Steve Gottlieb