Hello Tina,
I am not a descendant of the Birch family but my ancestors worked at Birchgrove for the Birch family starting around 1850 before they immigrated to the United States in the 1890s.
In my original inquiry I was seeking help in trying to establish a link between the Birch family at Birchgrove (Roscrea, Co. Tippeary) and another Birch family in Tullylish Parish in Co. Down.
The Birch family ran a famous whiskey distillery at Birchgrove before government officials shut the operation down. As the family tried to diversify, they established a flax scutching mill at the former distillery and brought an expert from the "North" or "Belfast" to set up the operation as flax scutching was not a common occupation in the south of Ireland at the time. That person was my third great grandfather Peter Devlin.
I wanted to see if the northern Birch family and the southern Birch family were somehow connected and perhaps some arrangement existed between the two families to have Devlin sent South to work for your ancestors. I have a few scant leads about Peter Devlin being born in either 1833 or 1834 but have been unable to nail down his "hometown" (I suspect it may have been somewhere around Tullyish or prehaps Belfast). The Devlins lived in the "yard" of the estate probably until the 1880s.
Since you are interested in your Birch ancestors I can direct you to a few links you may find interesting:
http://www.roscreathroughtheages.org/birchgrove-house.htmlhttp://www.roscreathroughtheages.org/corville-house.htmlhttps://irishwaterwayshistory.com/abandoned-or-little-used-irish-waterways/midlands-turf-waterways/the-roscrea-canals/http://www.roscreathroughtheages.org/files/roscrea-people-2010.pdf(pages 82 to page 87)
I hope this may help you in your research.
