As custodian, the station clerk is responsible for all Government property, including arms, ammunition, bicycles, articles of clothing and equipment other than such as are in the personal charge of individual officers, and all unclaimed property connected with cases, including cattle in the pound. He is in direct charge of the store-room and shall keep the keys thereof and personally superintend all receipts and issues therefrom. He shall also be responsible for the safe custody and diet- ing of persons in the lock-up and shall personally keep the keys thereof.