And old Grey Mare of a different colour, from Ireland.
Jim Carroll

The Old Grey Mare
All you young men both great and small take counsel and be wise,
Attention pay to what I say, my lectures don't despise,
Let patience guide you on every side, of traitors now beware,
There is none but men that's sound within can ride my Old Grey Mare.

Granuia's sons great wonder done, they set olid Ireland free,
Joshua and Diavid's sons, likewise M.cAbee,
Constant the Great will ever shine and be our standard rear,
There's none but men chat's sound within can ride my Old Grey Mare.

Buonaparte on her did sitant, he rode full fast, it's true,
At Moscow plain she got lame and was beat at Waterloo,
She sailed o'er to' the Shamrock shore where Dan he did her care,
The very next chase, she won the race, my sporting Old Grey Mare.

In Erin's Isle, when fortune smiled, there lived Brian Borue,
Phelan O'Neil, Carlinton Miles, Sarsfieild and Munroe;
Bold
Roderick you know, not long ago, ranged Wexford aod Kildare,
Tandy, Sheares and other peers, they rode on my Grey Mare.

In mutual love, as pure as a dove, when we do each other greet,
Beware of scrapes., broils and spars, or quarrels when you meet,
Don't probe old sores, nor conquer Job*, let patience guide you there,
Lest in a fog that you might bog and drown my Old Grey Mare.
*[cankered jobs]

These three hundred years, as it appears, no steady statesman did her ride,
'Til Providence had gave due sense and reared the people's guide,
Brave noble Dan, ,he now rides on, Erin's right's his only care,
The Parliament for to be sent -back on my Old Grey Mare.

O'Donovan Rossa, who learned this song in his childhood, was certain that the wonderful horse meant Ireland (Rossa's Recollections), but, as Georges Zimmermann points out, "this does not stand the reading of the whole song.
The different texts would rather evoke confused ideas of glory, victory, perhaps justice or liberty.
In fact, the song has probably no emblematic meaning."
It was said to have been a great favourite of Irish revolutionary leader Padraig Pearse.
Napper Tandy and John and Henry Sheares were leaders of the United Irishmen.
Phelim O'Neill was a rebel leader executed in 1653
Eoghan Rhuadh O'Neill was one of the Earls of Ulster who left Ireland in 'The Flight of the Earls' returned with 300 veterans to aid the Irish Rebellion of 1641
Lord Edward FitzGerald was an Irish aristocrat and revolutionary who died in Newgate Prison, Dublin of wounds received while resisting arrest on a charge of treason in during the 1798 rebellion
Ref:
Songs of Irish Rebellion. Georges-Denis Zimmermann 1967