Alan Moore's Jerusalem: Book 3: Vernall's Inquest: Round the Bend: Line 13.

Line 13: "He'd been furteen, shy was only ten, to pet it baldly."

Non-Lucy-Lips Version: "He'd been fourteen, she was only ten, to put it boldly."

"He'd been furteen"
He was old enough to have pubic hair.

"to pet it baldly"
She was not.

"shy"
Shy for she as if her reticence to engage in sexual activity with her teenage brother was only down to her demeanor and personality.

"pet it baldly"
I mean, gross.