Prince Harry and Meghan Markle's emails and texts to their former close advisor Jason Knauf have emerged in court.The messages were made public on Wednesday as part of an appeal by the publisher of the Mail On Sunday against a High Court judge's decision that the publication of a letter sent from Meghan to her father was "unlawful".The correspondence gives a rare insight into the couple's communications and thoughts throughout the months leading up to their departure from the Royal family.