Christian Henry Heinecken, born at Lubeck, in 1721, spoke his mother tongue fluently at ten months of age; at one year old he knew the principal events of the Pentateuch; in two months more he was master of the entire histories of the Old and New Testaments; at two years and a half he answered the principal questions of geography, and in ancient and modern history. He spoke Latin, French, German, and Dutch with facility before the commencement of his fourth year. His constitution was so delicate that he was not weaned till a few months before his death which occurred in 1725.

— Bizarre Notes & Queries, April 1886