Neither the boat nor any soul of her company were ever seen or heard of again.
Flinders had only twelve days available for his own work, from February 16th till the 28th, but he made full and valuable use of that time in exploring, observing and charting.

The fruits of his researches were embodied in a drawing sent to the British Government by Hunter, when he announced the discovery of Bass Strait later on in 1798.

The principal geographical result was the discovery of the Kent group of islands, which Flinders named "in honour of my friend" the brave and accomplished sailor, William Kent, who commanded the Supply.
The biological notes made by Flinders on this expedition are of unusual interest.

Upon the islands he found "Kanguroo" (his invariable spelling of the word), "womat" (sic), the duck-billed platypus, aculeated ant-eater, geese, black swan, gannets, shags, gulls, red bills, crows, parrakeets, snakes, seals, and sooty petrels, a profusion of wild life highly fascinating in itself, and, in the case of the animals, affording striking evidence of connection with the mainland at a comparatively recent period.

The old male seals were described as of enormous size and extraordinary power.
"I levelled my gun at one, which was sitting on the top of a rock with his nose extended up towards the sun, and struck him with three musket balls.