The officer or agent of a demanding state to whom a prisoner may have been delivered following extradition proceedings in another state, or to whom a prisoner may have been delivered after waiving extradition in such other state, and who is passing through this state with such a prisoner for the purpose of immediately returning such prisoner to the demanding state may, when necessary, confine the prisoner in the jail of any county or city through which he may pass; and the keeper of such jail must receive and safely keep the prisoner until the officer or agent having charge of him is ready to proceed on his route, such officer or agent, however, being chargeable with the expense of keeping, provided, however, that such officer or agent shall produce and show to the keeper of such jail satisfactory written evidence of the fact that he is actually transporting such prisoner to the demanding state after a requisition by the executive authority of such demanding state or waiver thereof. Such person shall not be entitled to demand a new requisition while in this state.