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E IRe Mwrder.- Two other persons were 1 arrested at WenhaTn on Wednesday eve ming last, as accomplices in the murder oI I Capt. Jos. White-their names are Capt. Joseph J. Knapp, jun. and Capt. John F. Knapp, masters of vessels. They are young men, belonging to very respectable fana- fly, and the first is son-in-law of the lady who was niece of Capt. White, and for many years had lived in his family as house I keeper. A}gst ys @ 4 -saa This arrest wc understand has been made in consequence of disclosures recent ly made by a man arrested few days ago near Belfast, in the state of Maine, by the name of Palmer. Palmer was in this town 1 from the 23d Feb. till the funeral of Capt. White. In his disclosure he mentions that l he staid at the Lafayette Coffee House some time under tho assumed name of Cayr; and on recurring to the books of their establishment it appears that stran- ger who called his name Carr remained there two weeks without appearing to have any business or any acquaintance in town, and spent his time in reading and in retire. 1 ment. ..r..5 .a.-. .., ss.-4 ,..s.a.k M

 The arrest of Palmer was made in cons sequence of letter received here about ten days ago, by mail from the. vicinity of 1 Belfast, addressed to" Capt. J. Knapp" purportng to come from one Grant, de- handing money to be sent to him by mail, to be left at the Post Office in the town of Prospect,-a person then went from this town, deposited in the Post Office letter with money tn it, addressed to Grant, ,--af- ter waiting a few days, a person appeared & called for the letter, saying his name was not Grant, but Palmer, and that his place of residence was in another town. He is now in custody. and is to be brought to ihis town. ,. .a.eg ts .. .s s

 A search was made yesterday, under al warrant from MT. Justice Savage, about the premises of the Crowinshields, in Dan- vers, but we believe the objects sought for were not discovered. d aa'd ' go'tIs

 The Knapps are committed to goal for examination. "

 7Ne Portiand Courier says, on Pal mer's calling for the letter the Post Master observed. that he wished to be certain that the letter was delivered to the right person, as it probably, from it's appearance, con- tained money. The letter was according ly delivered, and the man immediately ta- ken charge of by an officer. We learn that he made some disclosure, such ps, he could show them the hatchet with which the first f.%-i Ss~~ ...@s inflicted nh Ah4- t4rl.:..2 ' and that the dirks had been melted up.

 Ihe Murder of Mr. White explained.--- Tn the Boston Patriot ofthe 1st we find the following particulars of the confession of Joseph J.. Knapp, Jr. They are taken from the Salem Observer cztr0 of Sunday evening:

 Some months since Joseph J. Knapp, Jr. who. married the grand niece of Capt. White, and tho daughter of his house keep- CT, stated hypothetical case to lawyer, and fron. him understood that if Captain White died intcstate, his mother-in-law, as the sole representative of Capt. Whites sister, would inherit half the estate--all tho other heirs at law being representatives of Capt. Whites brother.

 In order to effect this object, Knapp proposed to his brother John E. Knapp to murder Capt. White. His brother re- piled, that he. would not do it himself, bu he knew who would he could get Rich. ard Crowninshield, Jr. &yf

 R. Crowninshield, Jr. was employed for that object, by John F. Knapp, at hi brothers request, and was to receive, W. understand, 5000 for accomplishing th' object. V, .e s,l

 On Friday, 2d April, J. J. Knapp, Jr vent into Capt. White's chamber ant took from the iron chest a will, which he supposed to be Capt. W.'s last will, car. ried it to Wenhan,, aud kept it in lis pos session until he heard of Capt. W.'s death, and then destroyed it. On the same day he procured the will, he unbarred the win- dow shutter and nnscrcwed the window, by which Crowninshield entered. Knapp rec turned to Wenham same day and did not return to Salem again until the murder was committed. ala ~t

 The murder was committed by Crown inshield alone. He alone was in the house, It was effected by dirk, (which has moi been found as reported and by a bludgeoi of hickory, with large head, loaded witl lead. aaa A st.s The murder was committed about 20 minutes past ten o'clock. Ast

 Whilsf the deed was doing, J. F. Knapp was watching in Brown street, and tt was him whom Mrs. Bray Saw. It was Grown inshield she saw join him, after the deed ; whom Capt. Bray saw run down Howard street-under the steps of the Howard