Green’s Dictionary of Slang

to gallop; thus spieler n. a good horseman.

1844		New Sprees of London 3: I tell you what, such a cove as you should speal to the big town and let experience put you fly to the caperanies.
1846		Swell’s Night Guide 61: Come, Sall, speel, come hook it; Billy’s good for the drainums.
1855		Yokel’s Preceptor 30: Speal, To run away.
1889		Dead Bird (Sydney) 7 Dec. 7/1: No more shall we galantly mount the old cob / Or spiel on the fourteen-mile plains.
1895		‘Banjo’ Paterson ‘Old Pardon, the Son of Reprieve’ in Man from Snowy River (1902) 14: If Pardon don’t spiel like tarnation / And win the next heat — if he can — / He’ll earn a disqualification.
1902		Bulletin Reciter 1880–1901 122: If they saddles a big-boned angel—with a turn o’ speed, of course—As can spiel like a four-year brumby, an’ prop like an old camp-horse.
1905		‘The Broken-down Squatter’ in ‘Banjo’ Paterson Old Bush Songs 56: No more shall we muster the river for fats, / Or spiel on the Fifteen-mile plain.
1936		(con. 1830s–60s) ‘Miles Franklin’ All That Swagger 99: The galoot, for good or ill, was transformed into [...] a jockey, a spieler, a drover, a horse-breaker.