Okay. Earlier … before Vincent, ummm, went to work …
you saw some illustrations from the story in progress

An image of a stone tile carved with an intricate Celtic knot. Text reads: Iron Behind the Velvet

A dark and mysterious stone cellar, with a flight of narrow steps leading up into a pale light.a photograph taken inside a wall walk - or mural passage - a stone wall built so that someone could walk within its walls and not be seen passing. A secret passage within a stone wall.

a very romantic photograph of an underground bathing chamber, through a key-hole door - a private pool Vincent and Catherine use, and use quite well!

And Vincent, Catherine, and Father 
bemoaning the time it's taking me to finish it …

Father is looking at Vincent with an incredulous expression on his face. The text reads: Father says, "Still? Surely you do … something … to hurry - I mean - help her?!"Catherine is at her desk, her hand to her forehead, looking pained. Text reads: How much long can this possibly go on?

Vincent at his desk with his hand covering his eyes; Catherine sitting on Vincent's bed. Text reads: Vincent! You can't just sit there! Do something!Vincent and Catherine on her balcony. She got her head propped on one hand, looking up at Vincent with a curious expression on her face. Vincent leans on the balcony wall, looking pensive. Text reads: You thought of something, Catherine says. Yes, Vincent answers. Catherine says, Tell me.

Catherine is gripping Vincent's arm; he's looking all worried. Text reads: Vincent says, "I don't know if I'm up to this." Catherine says, "You can do it. I don't mind sharing you … if it gets the job done."

So what do you do next?

On the next page of Imagine That,  
an illustration matches a photograph on this page. 

It will have the key in it.

When you find the matching illustration with the key in it,
just click the photograph to be on your way.

(not the sidebar - just THIS post page. 
The photo with the key is not in the sidebar.)