Pigskin synonyms

An appendix that gives some account of the "Pigskin Library" which he carried with him for daily reading in the heart of Africa is a surprising exposition of the wide range of his reading.

Not content to let it burn by natural draught, he would blow it with his own breath, would expose it to the prevalent wind, would urge it with a fan, and would devise the first crude valveless bellows, perhaps the pigskin already familiar as a water-bottle, of which the psalmist says: I am become as a bottle in the smoke."