Ml-ITABt Against Civil Law ix Ntw Yoee.—Major-General Hooker made a return, yesterday, to the writ of habeas corpus issued ; | in relation to Robert Martin, one of the alleged i - city incendiaries, at present confined in Fort j Lafayette. The return refuses to produce Mar- ; . lin on the ground that he is a military pri- ' soner and outside the power of the civil law. ; ]