"We are losing loved ones to conspiracy theories."
The Mail, he argued, had no prospect of winning.
"There are still a lot of hurt feelings on all sides and it's very difficult."
"It looked to me as a casual observer that his hair had grown very long."
Meghan had admitted struggling with her royal role.
She promises to reveal "hidden truths" about the Duchess.
The refusal reportedly left the Prince upset.
The couple gave generously to kids' charity Make Give Love.
Archie has not been seen publicly since his first birthday in May.