"Better get that lotion made up. Where is this? Ah yes, the last time. Sweny's in Lincoln place. Chemists rarely move. Their green and gold beaconjars too heavy to stir. Hamilton Long's, founded in the year of the flood." (U5.462)
On this PC of Grafton street, we can see Hamilton Long & Co. Ltd. Medical Hall and Compounding Establishment. Their main addresses were 107 Grafton street and 3 Sackville street. They also had branches in Rathmines, Kingstown and Clontarf.