I have the International Zoo Yearbook volume 7. There is no photo of the exhibit. I thought there was.
The first time this exhibit appeared on the map was in chester Zoo News March 1969, number 47a Penguins and Otters,
The redrawn map was published in Chester Zoo News and Guide May 1971 and the enclosure was listed as no.47 Penguins.
Several mentions were made in Chester Zoo News and Guide.
I am amazed that they reared Blackfooted (1970) and Humboldt's Penguins (1974) in the enclosure.
Chester Zoo News and Guide April 1969 page 14 mentions 6 small-clawed otters in the exhibit.
Chester Zoo News and Guide July 1969 mentions the arrival of a mate for the lone Humboldt's Penguin. Humboldt's, Jackass (demersus) and Rockhopper Penguins were housed together.
Chester Zoo News and Guide July 1970 page 10 The arrival of 3 Humboldt's Penguins and a Gannet was reported. The Gannet was housed with the penguins.
Chester Zoo News and Guide August 1970 page 3 Hatchint of a Black-footed Penguin reported.
Chester Zoo News and Guide Octoer 1970 page 12 follow up report on penguin chick, photograph on page 13
Chester Zoo News and Guide January 1972 page 4 The arrival of 3 Rockhopper Penguins bringing the total up to 7, picture included.
Chester Zoo News and Guide July 1972 page 15. Because the Rockhopper penguins seldon used their swimming tank, it was decided to exhibit American Brook Trout and Rainbow Trout in it.
Chester Zoo News and Guide March 1974 page 10. Arrival of 5 Pike reported for one of the tanks in the penguin enclosure, the other being occupied by Rainbow Trout.
Chester Zoo News and Guide January 1975 page 4 Recording of a Humboldt's Penguin chick hatched in December 1974.
Chester Zoo News and Guide Decmeber 1977 page 5 Arrival of 10 Gentoo Penguins.
Chester Zoo News and Guide July 1980 page 3 Proposed new penguin pool.
Gentoo Penguins
Gentoo Penguins Chester Zoo 19 April 1979 - ZooChat