7he murder of JNr. White erplainea The Salem Observer, gives the fola.- ing particulars of the confession oi aa, Joseph J. Knapp, Jr. Y

 Some months since, Joseph J. KKpann

 JF. who married the grand nieee'a IF f Capt. White, and the daughter of K. hflotsekeepeT, stated q hypothetical cass to a lawyer, and from him understoes that if Capt. White died intestate. b;s mother-in-law, as the solerepresentat;sss of Capt. Whites sister, would ipiert t'' half the estate-all the other heirs at law being representatives of Capia;s Whites brother.

 In order to effect this object, Knapa proposed to his brother,John F. kpanlf to murder Capt. White. His brothpap,' hpp' replied that he would not do it himself but he knew who would; be could pet Richard Crowninshield, .Jr. k. Crowninshield, .jr. was employea. for that object, by John r. Knapp. # his brother's.request, and was to receive. we understand, Sl000 for accomplish. l ing inc object.

 On Friday, Sd April, J. J. Knapp, Jr. went into Captain White's chamber and took from the iron chest a will. (which he supposed to be Capt. Whites last will, carried it to Wenham, and kept 1t in his possession until he heard of Capt. W's death, and then destroyed it. On the same day he procured the will, he unbarred the window. by which GfowniDshield entered. ISnappTeturn- cd to Wenham the same day; and did not return to Salem again until until the snur- der was committed.

 The mardeTwas committed by Grown. inshield alone. lie alone was in the house. Ii waseflected by a lirk, (which has not been found as reported,) and by a bludgeon of hickory, with large head loaded with lead.

 The murder was committed about % minutes past i0 o'clock. Whilst the deed was doing J.T. Knapp was watching in Brown street, and t was him who Mrs. Bray saa. t was Crowninshield whom she saw ioin him, after the deed; whom Capt. Eray saw run down Howard street-unser the steps Of the Howard street Meeting house, the bludgeon was deposited; and there it has been found; Knapp's con. iession having lead to its discovery.

 The day after the murder J. ?. P Knapp and Crowninshield rode to Wenham. where J. J. Knapp, Jr. gave [. all the money lie then had, being l00 fiye-franc pieces-at which lime Crowninshield stated to him the man. her in which the deed was accomplish. ed.

 J. J. Knapp, Jr. acknowledges him, sell author of several infamous anony. nous letters, which have been sent to the Hon. Stephen White and the Com mittee of Vigilance, since the murder. We do not learn that K. duplicates any other individuals but K. Crowllils- shield, Jr. and his own brother.