I want to know the answer to the following question:
Who visited Chopin in 1844 and wrote about his inability to move?
All the background I'm provided with is that "Late in 1844, Charles Hallé visited Chopin and found him "hardly able to move, bent like a half-opened penknife and evidently in great pain", although his spirits returned when he started to play the piano for his visitor.". Is that enough to answer the question?