unable

... Prisoners of war who, owing to their physical or mental condition, are unable to state their identity, shall be handed over to the medical service. The identity of such prisoners shall be established by all possible means, subject to the provisions of the preceding paragraph. ...

... Mail and parcels addressed to their former camp shall be forwarded to them without delay. The camp commander shall take, in agreement with the prisoners' representative, any measures needed to ensure the transport of the prisoners' community property and of the luggage they are unable to take with them in consequence of restrictions imposed by virtue of the second paragraph of this Article. ...

... Prisoners of war who have been without news for a long period, or who are unable to receive news from their next of kin or to give them news by the ordinary postal route, as well as those who are at a great distance from their homes, shall be permitted to send telegrams, the fees being charged against the prisoners of war's accounts with the Detaining Power or paid in the currency at their disposal. They shall likewise benefit by this measure in cases of urgency. ...