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Gale found one IC object: the planetary nebula IC 5150 in Grus. He discovered it with the 8.5" refractor at Sidney Observatory on June 4, 1894; see AN 3426, New Double Stars and a Ring Nebula, p. 293 (1896). Gale's observation was confirmed by Pietro Baracchi (director of the Melbourne Observatory) with the 48" reflector, seeing a ring of 1.5' diameter with a non-empty inner part. The same object was found by Swift on July 23, 1897 with the 16" refractor on Mt. Lowe, his #29 in MNRAS 59, 568 (1899), but Dreyer included it as a different entry (IC 5148) in the IC II (see: C. Hoffmeister, Die Sterne 37, 204, 1961).
Obituary: MNRAS 106, 29 (1946)
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