This section is from the book "Anatomy Of The Arteries Of The Human Body", by John Hatch Power. Also available from Amazon: Anatomy of the Arteries of the Human Body, with the Descriptive Anatomy of the Heart.
The Nerves Of The Heart are principally derived from the cervical ganglia of the sympathetic nerve; the remainder proceed from the pneumogastric and recurrent nerves: they are distributed in greater number on the right side than on the left.
* Jeffray on the Foetal Heart.
† Mem. de l'Acad. des Sciences, 1738.