A bit more on Patrick Halpin , born 1901, of Cork St (The one who had been, aged 10, with his gran in Drumboory, Co Monaghan in 1911 as Patrick Halfpenny). He joined Fianna Eireann,"6" Sluagh, 1ad Cath, in late in 1915 or early 1916.
On Easter Monday, 1916, they paraded in Donore Avenue. On the Tuesday he went to the garrison in Jameson's Distillery, Marrowbone Lane and was sent to collect ammunition from 42 Ruben St. For the remainder of the week he delivered messages. He stayed on in the Fianna. In 1920, he joined the Volunteers, C Company, 4th Batt.
So Halpins dairy in Cork Street would have been a good place for the fugitives from Jacobs garrison, to seek refuge.