Winged Beasts, a squandered resource?

[Gordis]

Honestly I don't believe a word in this article - and won't believe unless I see the source.

Take Scatha. I believe the following quote is the only one about this dragon.

Of his son, Fram, they tell that he slew Scatha, the great dragon of Ered Mithrin, and the land had peace from the long-worms afterwards. Thus Fram won great wealth, but was at feud with the Dwarves, who claimed the hoard of Scatha. Fram would not yield them a penny, and sent to them instead the teeth of Scatha made into a necklace, saying: "Jewels such as these you will not match in your treasuries, for they are hard to come by." Some say that the Dwarves slew Fram for this insult.

So where is the mention of the two legs?

There is no mention of Scatha in the Silm, or UT, or Tolkien's Letters, or in Home 12, as far as I can see..

Can someone fine another source speaking of Scatha?


Yet in the L # 19 there is a mention of the lecture on dragons Tolkien had to prepare for Natural History Museum (!)
( Note: On 1 January 1938 Tolkien lectured on 'Dragons' as part of a series of lectures for children at the University Museum, Oxford.)

I wonder is there more info about this lecture?