Who is Mrs Sparcit? Define prowler. Describe Mr.Sparcit and when did he die.

Mrs. Sparsit

Mrs. Sparsit is a widow who has fallen on hard times. She is retained in Mr. Bounderby's service until her snooping gets her fired.

As for Mr. Sparsit's death, we are told the following;

Thus, when he died, at twenty-four (the scene of his decease, Calais, and the cause, brandy), he did not leave his widow, from whom he had been separated soon after the honeymoon, in affluent circumstances. 

A prowler is someone who sneaks around with the intention of stealing.