afternoon, about half past two o'clock
Marcus immediately recognized the envelope and the address as similar to those of the first letter , which he still had in his possession . He pulled the letter nervously from its yellow sheath , and read as follows : MR. MINFORD : DEAR SIR , -- Pardon me for intruding on you a second time . But , as a friend of virtue , I must warn you of continued danger to your daughter from the acquaintance of Mr. Wilkeson , your pretended benefactor . If you are any longer in doubt as to the vile intentions of this man , conceal yourself from observation within sight of Miss Pillbody 's school , any fair afternoon , about half past two o'clock , and watch his actions . If his suspicious conduct , at that time and place , does not give a sufficient significance to my warnings , then take the trouble to go to -- , Westchester Co. , where he was born , and search into his infamous history . Take heed -- I warn you again -- lest , in your devotion to science , you forget that you are a father . ONE WHO WOULD SHIELD THE INNOCENT .