Sentence:  "This is a strange note," said Mr. Utterson; and then sharply, "How do you come to have it open?" "The man at Maw's was main angry, sir, and he threw it back to me like so much dirt," returned Poole. "This is unquestionably the doctor's <WSD>hand</WSD>, do you know?" resumed the lawyer. "I thought it looked like it," said the servant rather sulkily; and then, with another voice, "But what matters <WSD>hand</WSD> of write?" he said. "I've seen him!" 
Meaning of the word marked with <WSD> tags:  Handwriting; style of penmanship.