Complex sentence: An instrument was also commissioned for the Countess of Lonsdale, the daughter of the Earl of Bute, possibly the organ on the National Pipe Organ Register at Lowther Castle.
Split into simpler sentences: An instrument was also commissioned for the Countess of Lonsdale, the daughter of the Earl of Bute. It is possibly the extant organ on the National Pipe Organ Register at Lowther Castle.