Prince of Wales' Motto

The Query of Effessa is one of great interest to us "Taffies," but I wish to add the following to it. Is there any foundation for the idea, which we so strenuously maintain, that "*Ich Dien*" is a misspelled edition of "*Eich Dyn*," "Behold the man:" and that the motto was bestowed on Edward of Carnarvon in consequence of his royal father having learned these two Welsh words, and made use of them when he presented his infant to the assembled tribes as a prince who could "speak no word of English?"