Describe the disaster with the terrapin pond.

In Chapter 18, Gerald adds goldfish to his new terrapin pond and believes the pond is now ready to be admired by company. When Gerald later checks on the animals, he is upset to find that two of his goldfish have been partially eaten by terrapin, snakes or both. Gerald decides to remove the snakes and terrapin until a more permanent solution can be found. As Gerald feeds the birds, he thinks about a solution, but when he returns, he finds that the snakes have been moved into the sun and are heat-stricken.