David posted this a long long time ago and for some reason I saved it. I didn't save the link however, but maybe David remembers something about this?

GP
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Newgrary Burrin Ireland 7 January 1865
Sir
I congradulate you on the recent .... I was uneasy about (your Sherman?). I see you want 300 thousand men to put the finishing stroke to the War giving a bounty of 800 dollars to each man. Some months ago it was expected the American Gov. intended granting a free immigration to Irish among other people, and it was reported twas an agent (consular?)was actually overwhelmed with applications. A soldier of Class...tition ...... told me not many days ago that every man in the Regt. 900 strong.... would immigrate understanding the .... if paid their passages and give them some money to leave with their families. You see how truly ... ... ... ... .... From your exalted position you could of not of course do this .... if you are not badly advised you will send me 20 pounds a head and I will send you 5000 men. A letter can be written by some person ... only saying "I enclose your draft or drafts on the Bank of Ireland, the Provisional Bank of Ireland, the National Bank of Ireland for 100 thousand pounds. ... ... the ...... ... ABL" and I .... you my word as a gentleman the money shall be properly applied. ... not answer for ... ... or any of your consular agents to know anything about the matter. If Lord Grant has 5000 fresh men he would soon .... and all .... over and President Lincoln immortalized and mark my words you may regret not taking my advice. As to the Conscription no free state will submit to it and you will rather .... than ... yourself by resorting to it. ... it by letters from Irish peoples in America to their friends in this country. If you have a war with England about Canada which is considered very likely, the English navy is strong enough to break the blockade and seriously damage your trade and immigration should cease so be wise which there is yet time. The arming of the slaves by the zelots will delay the termination of the war. The notes passed by the emigrants will be in America before them. They must pay or swim the former they will not be able to do.
Goto
http://memory.loc.gov/ammem/malquery.html
type in the word "Ireland" and push "search". It should be number 2 on the list but if it is not the title is
William Smyth to Abraham Lincoln, Saturday, January 07, 1865 (Support from Ireland)