From the sheet music at National Library of Australia:

SEE WHAT PERCY'S PICKED UP IN THE PARK
Harry Castling and Joe Burley
London: Francis, Day and Hunter, 1912.
Melbourne: Allan & Co., 1912.*

1. At six o'clock one Sunday night, I first met Percy Brown.
At seven o'clock, you see,
He was making love to me.
At eight o'clock, he took me home to see his ma and pa,
Because his ma and pa, he said, were most particular.
As I stood in their best room wond'ring what they'd think of me,
I heard somebody giggling, then in march'd the family.

CHORUS: Then Percy's mother fixed me with a look
Such a funny look!
Read me like a book
Percy's father walked round me
And the dog on the mat began to bark, bow-wow-wow!
All the kids came peeping thro' the door,
Thro' the parlour door,
Then they all began to roar,
"Oh, Jerusalem! come and see
What Percy's picked up in the park!" (Wow-wow!)

2. His little brother said, "I wonder if the thing's alive!"
And then he got a pin
And, of course, he stuck it in.
And then his Uncle Jeremiah said, "This takes the bun!
What funny things you do see when you haven't got a gun!"
The young man lodger came in, look'd at me and said, "Dear, dear!
What curious little insects fly about this time o' year!"

3. His aunt came in and said she'd seen things like me in a field
Stuck up there all in rows,
To terrify the crows.
As Percy led me to the door, his mother said, "Look here,
You'd better go and lose it where you found it, Percy dear!"
I s'pose my style of dressing didn't suit his stuck-up ma
But you cannot judge the raspb'ry by the label on the jar.

[* The Australian edition says: "Miss Dolly Harmer's successful song in J. C. Williamson's spectacular pantomime 'Forty Thieves' staged by Chas. Wenman."]