Did Lincoln visit Missouri in 1840?

[Donna McCreary]

I am sitting here reading the papers in a folder I marked, "Courtship with Lincoln." The folder contains several newspaper articles and a copy of a letter written by North Todd Gentry.
These documents claim that in 1840, Lincoln traveled to Rocheport, Missouri to attend a Whig political meeting.

Most historians dispute the story stating that Lincoln was in Springfield at court on June 18 - 20.

The letter from North Todd Gentry does not give specific dates, just that the rally lasted several days. The newspaper articles only state that the visit was in June.

Thoughts?