Hi, Q. Thanks for the verses from so long ago. I can see a group of Cub Scouts loving that song about Noah's ark.

That word 'moak' is probably 'moke.'

Dictionary.com says 'moke' is

1. Older Slang: Disparaging and Offensive. a black person.
2. British Slang. a donkey.
3. Australian Slang. a poor-looking, inferior horse.

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Origin:
1840–50; origin uncertain