I have, which you have never bothered to read. In the link I provided earlier it states that the message to Chew was in an envelope signed by Lincoln. Later in the same link it references Chew's April 8 Report where he confirms he met with the governor, gave him the message and delivered the written letter.
Happy?
You can post on all you like.
You know that there was no formal letter....no address from the White House....no Lincoln signature....nothing to validate Chew except his and Talbot’s word.