May - August. Mid-Oct - mid-December, possibly January.
So they were in a relationship for all of September? I might actually restart my re-reading soon. I got through to about the start of the boxing thing, which was where we were at when I first started reading the story, and not further. So I really have no clue if it flows from that point to this well.
Henderson is failing in his duties if he has not shown you her picture yet.
HENDERSON: Why would I carry a picture of Lane around with me?

OK, so maybe you do have a point. I guess he would see no more reason to show Clark a picture of Lois than a picture of Perry.
I always figured it was with the amazing accuracy Clark had.
Oh, you mean a combo of fast, steady hands and eidetic memory?
But it is just more cool to call it "super drawing", along with his super-weaving ability used in the comics once.