How does George MacDonald Fraser use imagery in Flashman's Lady?

Examples of Imagery:

'Flashman,' cries he, as I turned away, 'don't go to—to that place, I beseech you. It ain't worthy—'
'How would you know?' says I. 'See you at Lord's.' And I left him full of Christian anguish at the sight of the hardened sinner going down to the Pit. The best of it was, he was probably as full of holy torment at the thought of my foul fornications as he would have been if he'd galloped that German tart himself; that's unselfishness for you. But she'd have been wasted on him anyway."

".... when I heard a sound that galvanised me so suddenly that it's a wonder the couch didn't give way—rapid footsteps were approaching the drawing-room door. I took stock—breeches down, one shoe off, miles from the window or any convenient cover, Mrs Lade kneeling on the couch, me peering from behind through her feathered headdress (which she had forgotten to remove; quite a compliment, I remember thinking), the doorknob turning."