Emergency Help Needed

[L Verge]

I have a gentleman who is big in the collecting world with a specialty in Lincoln, but he's bedridden now and needs an answer quickly. He needs to know the source for this Lincoln quote:

"I do the very best I know how -- the very best I can: I mean to keep doing so until the end. ..."

The full quote is even lengthier, but this should be all you detectives need. He was obviously reading from a handwritten version also.