You can find a midi and brief history here. I’m not too worried about finding an .mp3, as I’m fairly familiar with this one, but if you scroll down this page you’ll find one.

Speed bonnie boat, like a bird on the wing,
Onward, the sailors cry
Carry the lad that’s born to be king
Over the sea to Skye

Loud the winds howl, loud the waves roar,
Thunder clouds rend the air;
Baffled our foe’s stand on the shore
Follow they will not dare

Speed bonnie boat, like a bird on the wing,
Onward, the sailors cry
Carry the lad that’s born to be king
Over the sea to Skye

Though the waves leap, soft shall ye sleep
Ocean’s a royal bed
Rocked in the deep, Flora will keep
Watch by your weary head

Speed bonnie boat, like a bird on the wing,
Onward, the sailors cry
Carry the lad that’s born to be king
Over the sea to Skye

Many’s the lad fought on that day
Well the claymore could wield
When the night came, silently lay
Dead on Culloden’s field

Speed bonnie boat, like a bird on the wing,
Onward, the sailors cry
Carry the lad that’s born to be king
Over the sea to Skye

Burned are our homes, exile and death
Scatter the loyal men
Yet, e’er the sword cool in the sheath,
Charlie will come again.

Speed bonnie boat, like a bird on the wing,
Onward, the sailors cry
Carry the lad that’s born to be king
Over the sea to Skye