This web page attributes the song to Mary Maxwell Campbell, 1829.

This web page (among several others) gives a somewhat different version of the chorus. It also has a midi file.

CHORUS: I hear the pibroch sounding, sounding
Deep o'er the mountain and glen
While light springing footsteps
Are trampling the heath.
'Tis the march of the Cameron men.
'Tis the march, 'tis the march,
'Tis the march of the Cameron men.

This web page has a Gaelic version, but it doesn't say which is the original and which is the translation.

CAISMEACHD CHLOINN CHAMSHROIN

1. Chan 'eil oganach treun de chloinn Chamshroin gu leir
Nach teid deonach fo Bhrataich Loch Ial
Gu buaidh no gu bas's bidh iad dileas 's gach cas,
Oir geill cha tug Camshronach riamh.

SEISD: Nach cluinn sibh fuaim na pioba tighinn
Gu h-ard thar monadh is ghleann;
Agus cas cheuman
Eutrom a'saltairt an fhraoich
'S i caismeachd Chloinn Chamshroin a th'ann!
'S i th'ann! 'S i th'ann!
S i caismeachd Chloinn Chamshroin a th'ann!

2. O! 's uallach an ceum, ged tha fios aig treun
Gum faod e 'bh maireach 'san uir;
Ach gach armuinn, gun sgath, theid le 'Cheannard do'n bhlar
Far'm bu dual dhaibh buaidh agus cliu. SEISD

3. Tha 'ghealach ag eiridh, 's tha gathan air ceuman
Nan oigear tha treun agus fior;
'S rad dochas an cleibh, 's thuirt an Ceannard e fein
Gur laoch iad nach geill anns an stri. SEISD