[3] The Tullamore Dew brand was later sold to John Powers & Co., now part of Irish Distillers, with production transferred to the Midleton Distillery.
[4] In 2012, a whiskey museum, the Tullamore Dew Visitor Centre, opened in a restored former bonded warehouse belonging to the old distillery on Bury Quay.
In the 1830s, Molloy expanded the distilling operation, purchasing an adjoining mill on Patrick Street, and by 1832, the distillery had an output of over 20,000 gallons per annum.
The whiskey he noted, was "Old Pot Still" and "sold all over Ireland, but principally in Dublin, whilst a large quantity goes to Liverpool, London, and Australia".
[3] Like many Irish distilleries, the company suffered in the early part of the 20th century, due to the advent of competition from blended Scotch whisky, and the curtailment of exports to the British Empire and the United States during Prohibition and the Anglo-Irish Trade War.
[3][8] Better than Williams' own reconstructed recipe, the result was Irish Mist, the first modern whiskey liqueur to be launched in Ireland.
[3] Irish Mist was a roaring success for the distillery, however, with whiskey sales still languishing, the company decided to focus its limited resources on the liqueur.
Although the distillery has now been closed and replaced with a new site on the outskirts of Tullamore, many of the original buildings are still in existence, though their function has changed.
In 2012, a former bonded warehouse belonging to the original distillery was renovated and reopened as a whiskey museum and visitor centre.