Was just scouring the AMAZING Wellington Database at the University of Southampton (http://www.archives.soton.ac.uk/wellington/) to see if I could find any reference to John’s correspondence with the Duke, and found this in regard to the Catholic Emancipation issue in 1829.
It’s from a letter to Lord Camden, 29 March 1829:
In other words, John and the Duke of Wellington were only both awake for a short period of the day 😉 (In John’s defence it looks like his health was already poor.)
Incidentally it seems John opposed Catholic Emancipation, which doesn’t surprise me as he seems to have been rather against it in 1800-1801 when Pitt the Younger thought of proposing it. He sent a letter to Camden, 1 April 1829, asking Camden to make use of his proxy vote in the House of Lords in favour of the Bill, but explained “I cannot say that I am quite satisfied of the urgency there was of pressing forward the measure of concession, but I am clear that there is now but one course to be pursued and from my confidence in the Duke of Wellington and my anxious wish to support his government, I shall certainly vote for the bill.” (WP1/1008/8)
This does slightly sadden me as one of the things that initially attracted me to Pitt was his willingness to keep an open mind on the Catholic question (… oh, goodness what a contentious point: watch the reams of emails from outraged historians come rolling in!), but I’ve always known Chatham was the more conservative of the two brothers and after all I can’t judge him by modern standards. (And yet.)
By the way if you haven’t found this database … check it out. It absolutely rocks.