When the Mitchell Family entered the whiskey bonding business in 1887, it was at the peak of the Victorian whiskey boom and pot still Irish whiskey was at its summit. As was the norm for that time in Ireland, there were hundreds of merchants involved in the bonding trade - purchasing new make whiskey spirit under bond (i.e. excise tax was not payable) and maturing it themselves before bottling it for sale.
As a result, there was an abundance of whiskeys available on the market, many carrying the same distiller's name, and differentiated only by the name of the bonder and bottler. Due to the suspect practices of certain bonders, the quality varied significantly, and in time, distillers began to bottle their own whiskeys, thereby guaranteeing the quality of the final bottled whiskey. Thus, the practice of selling whiskey to bonders died out and with that, so did most of the bonder whiskey brands.
There were, however, a couple of brands that survived, probably due to the consistent quality standards which they employed, and the Spot whiskeys were one such brand. For more info please visit https://www.singlepotstill.com/