The verse with "gold from Peru" also appears in this song. It's from a collection of songs from Ireland, Scotland and England, edited by Dan Milner. I don't have the book in front of me so I can't offer any of the notes. I wonder which song came first, "Here's a Health to the Company" or "The Donside Emigrant's Farewell"?

THE DONSIDE EMIGRANT'S FAREWELL

Come all my old comrades, once more let us join
And raise your sweet voices in chorus with mine
Let us drink and be merry, from sorrow refrain
For we may and may never meet all here again

The time's fast approaching that I must away
I bid you adieu for many's the long day
With you, my dear comrades, so happy we've been here
But away to Virginia my course I must steer

May Heaven protect us with a prosperous gale
And be our safeguard while we are under sail
Lead us safe to the harbor across the proud wave
We will trust to His mercy Who can sink or can save

Ye hills and low valleys of Donside, farewell
For if ever I return there is none here can tell
Farewell to your lasses of every degree
Long in vain will I wish for your sweet company

Farewell to the jewel, to you I love best
for you and your beauty excels all the rest
But if you prove constant as constant can be
Wherever I go, love, my heart is with thee

Many hearts will be happy, but mine will be sad
When I think on the joys that me and my love had
When I mind on the time that you sat on my knee
There was none in this world more happy than we

Farewell to my joys, they are gone for a while
Cold winter's away and the sweet summer smiles
I have heard an old proverb, found it to be true
That true love is better than gold from Peru

Come all my dear comrades, let's drink up our glass
Each lad drink a health to his darling sweet lass
Drink a health to each lover whose sweetheart is true
Here's a health, peace, and plenty; so farewell and adieu!