By petitions for writs of habeas corpus petitioners challenge the validity of proceedings to extradite them to Pennsylvania to stand trial for the distribution of obscene literature and related offenses. We issued orders to show cause directed to the sheriff of Los Angeles County and ordered petitioners released on bail. In his return the sheriff alleges that he took custody of petitioners pursuant to extradition warrants issued by the Governor of California. Copies of the warrants were filed with the return, and the original supporting papers from the Governor of Pennsylvania to the Governor of California were lodged with the court and a motion made that they be filed. These documents disclose that petitioners were indicted for crimes committed in Philadelphia County, Pennsylvania. Three petitioners were indicted for distributing and advertising obscene literature, and three for distributing and conspiring to distribute such literature. The crimes were allegedly committed in one case in 1956, in two cases in 1957, and in three cases in 1958.