This ia a little off subject but you are the only Armstrong from Co. Sligo Ireland that I have found! Your Clan and my Beattie's of Dumfrieshire Scotland rode together during the 1500 in the lawless Debateable Land on the border with Scotland/England. Also, on visiting the C of I St Peter and Paul churchyard Collooney I found Armstrong gravestones near to my family graves. Beatty's were blacksmiths near Quinns cross and it was a industrial area using the water power from the river. Flax was the main interest but there may also have been some wool! Do you know where your Wool Mill was in Co. Sligo?