Len Hill bought the uninhabited Jason Islands in March 1970 with the intention of turning them into a bird sanctuary. These notes are private issue and were initially sold to collectors to fund conservation work in the islands.

The series of notes consists of 5 denominations. The basic design common to all denominations is: a penguin on the left, Len Hill's signature as "Administrator" at the center and his portrait on the right. Each denomination shows a different type of penguin - a Humboldt Penguin on 50 Pence; a Jackass Penguin on 1 pound; a Rockhopper Penguin on 5 Pound; a Gentoo Penguin on 10 pound; and a King Penguin on 20 pounds.

Upon Len Hill's death, the islands were sold to New York philanthropist Michael Steinhardt who later donated them to the Wildlife Conservation Society.