This is what we found on Wikipedia regarding the The Man From Snowy River In Concert:

"The Man from Snowy River" is a poem by Australian bush poet Banjo Paterson. It was first published in The Bulletin, an Australian news magazine, on 26 April 1890, and was published by Angus & Robertson in October 1895, with other poems by Paterson, in The Man from Snowy River and Other Verses.

The poem tells the story of a horseback pursuit to recapture the colt of a prizewinning racehorse that escaped from its paddock and is living with the brumbies (wild horses) of the mountain ranges. Eventually the brumbies descend a seemingly impassable steep slope, at which point the assembled riders give up the pursuit, except the young protagonist, who spurs his "pony" (small horse) down the "terrible descent" and catches the mob.

Two characters mentioned in the early part of the poem are featured in previous Paterson poems: "Clancy of the Overflow" and Harrison from "Old Pardon, Son of Reprieve".