The lyrics sung by Charley Drew in the link above provided by and e go like this:

Now I've had lots of trouble meeting Mary
'Cuz Mary's ma and pa don't care for me.
Whenever I stop by, they both give me the eye,
Although I'm just as harmless as can be.
So I've arranged a place to meet my Mary:
A lovely place where we can bill and coo,
Where we can be alone, entirely on our own.
From now on, I'll meet Mary at the zoo

On Monday I'll meet Mary by the camel.
Who wouldn't walk a mile¹ to see those eyes of blue?
On Tuesday by the hare, on Wednesday by the bear,
On Thursday by the deer, we'll bill and coo.
On Friday I'll take her to see the monkey
Swinging on a shiny ring of brass
And on Saturday I'll have 'er by the donkey
And that's the time I'll have 'er ... By The Old Mill Stream

¹Many of the early ads for Camel cigarettes said, "I'd walk a mile for a Camel" (e.g., this one, and this one, and finally this description of how the phrase came about )