Meanings of wrap in sacking in English

The young officers had come crowding to the door, but Happy Tom received the first package, which was wrapped in sacking.

Pierre L'Oreillard had a small heavy bundle under his arm, wrapped in sacking, and then in burlap, and then in fine soft cloths.

Mycroft is average height, shorter because they stoop, and swimming in their oversized uniform, like a statue wrapped in sacking, waiting to be restored.

Heavily laden horses, which must have been spared by Supply, pulled a continuous train of sledges loaded with bodies wrapped in sacking or even paper.