On another occasion he said Meghan "would be nothing without me" and expressed fears that if Harry and Meghan were to have kids, they'd keep his grandkids from him because he'd been outspoken about the royal family.
"Auctioneer Andrew Aldridge told Fox News at the time: "[The letters] demonstrate the empathy and generosity Diana was able to show to some of the more vulnerable members [of] society and just illustrate what an incredible person she was".
Meghan, 37, wrote about the lost art in her now defunct lifestyle blog The Tigas the thing she loves most.
He also claimed Meghan was not the right woman for Harry and said she is a "jaded, shallow, conceited woman that will make a joke of you and the royal family heritage".
And this behaviour has only served to estrange Meghan further from her father. "Like the elephant in the room when she's with people she doesn't know very well", the source told the Mail.
The window fitter's remarks come days after Thomas Sr. compared the royal family to a "cult", telling The Sun newspaper on Friday, August 17, that the royals "are secretive".
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He concluded, "I think Meghan should have handled this from the beginning and I think it got ignored and swept under the carpet for so long, it's a shame where it's ended up, especially between her and my father".
"Meghan has been adamant that her mom not get dragged into all the drama", they added. If she was to make amends, by all means, she can do that. "But she's got to want to do it".
"Before she went to Suits, they were just in constant contact all the time and that's all he would ever talk about. He would have to reach out to her and I think their relationship became a lot more distant then and that hurt his feelings". "It would have been nice to at least get an invite to the wedding like he was", Thomas Jr. complained.
If Doria manages to pull this one off, she should probably be given some kind of Nobel Peace Prize. I think she owes him emotionally as his daughter to support him the way he supported her. "For what reasons, I don't know".
Markle's father has been speaking out non-stop to the British press, accusing the Royal Family of shutting him out of his daughter's life because of the staged paparazzi photos he agreed to appear in before the wedding.