It was built of bark and poles, and the floor was full of holes
Where each leak in rainy weather made a pool;
And the walls were mostly cracks lined with calico and sacks –
There was little need for windows in the school.

Then we rode to school and back by the rugged gully-track.......
http://members.ozemail.com.au/~natinfo/lawson/oldbarkschool.htm