Analysis of information sources in references of the Wikipedia article "Smaug" in English language version.
The Hobbit or There and Back Again by Tolkien, J.R.R. (cover art by J.R.R. Tolkien) London: George Allen & Unwin 1975 Third Edition (Paperback)... 1975... Cover illustration of Death of Smaug
If a man or a beast has drunk a worm ... Sing this charm nine times into the ear, and once an Our Father. The same charm may be sung against a penetrating worm. Sing it frequently on the wound and smear on your spittle, and take green centaury, pound it, apply it to the wound and bathe with hot cow's urine. MS. Harley 585, ff. 136b, 137a (11th century) (Lacnunga).
Tolkien's knowledge of Old English charms and remedies is also shown by his use of Lacnunga's term smeah wyrm 'penetrating worm.' This contributed to his conception of Smaug in The Hobbit; see Shippey (1992: 82).
If a man or a beast has drunk a worm ... Sing this charm nine times into the ear, and once an Our Father. The same charm may be sung against a penetrating worm. Sing it frequently on the wound and smear on your spittle, and take green centaury, pound it, apply it to the wound and bathe with hot cow's urine. MS. Harley 585, ff. 136b, 137a (11th century) (Lacnunga).
The Hobbit or There and Back Again by Tolkien, J.R.R. (cover art by J.R.R. Tolkien) London: George Allen & Unwin 1975 Third Edition (Paperback)... 1975... Cover illustration of Death of Smaug