Carlo's experience was reported in the Weekly Times of April 23, 1910. It is transcribed below, or you can read it here, on Trove.
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From Bent's Lookout, at the "Gorge," on Mount Buffalo, on Sunday morning about 5 o'clock, the Minister for Public Works (Mr Baillieu) saw Halley's Comet, and expressed his indebtedness
to Mr Catani, Chief Engineer of Public Works, who had called him up to view it.
"Viewed by the naked eye," said Mr Catani, "the comet looked like a tadpole diving for food. The body seemed to be about 2ft. long, and the tail about 4ft. long. At the junction with the body the tail appeared to be about 8in. wide and tapered off to a point. The best view was obtained from Bents' Lookout at the Gorge, but it could be clearly discerned from the verandah of the new State hospice just completed on the Mount. The situation approximately was ten degrees above the horizon, a little north of east."