Billy Sponge recipe please

Looking for a billy sponge recipe, made in a billy tin, and cooked in the oven.
Hoping someone can help

BILLY SPONGE
4 eggs
1 lb sugar (caster is best),
1 lb flour.
Beat eggs and caster sugar for twenty minutes. Then sift in flour
and mix -with a knife. Take a three pint billy, butter sides and bottom
well and sprinkle icing sugar on the sides (not on the bottom). Pour in
mixture and sprinkle icing sugar on top and put on lid. Bake in a good
oven for 40 minutes. At end of 20 minutes turn billy gently round in
the oven, but do not remove the lid until 40 minutes have passed.

Mrs Button's Billy Sponge

4 eggs
1 cup sugar
1 cup flour
1/2 teaspoon baking powder
and extra 1/4 cup sugar to sprinkle

Preheat oven to 180 degrees C. Spray a 23 x 12cm loaf tin, preferably non-stick, with non-stick cooking spray. Dust the tin with the extra sugar, shaking out any excess that doesn't stick to the surface.

With an electric mixer beat eggs and sugar until very thick and pale. Mix in the flour and baking powder and pour into the greased and sugared prepared tin. Sprinkle a little extra sugar over the top surface and bake for 30 to 35 minutes until well risen and rather cracked on the top.

Cool on a wire rack and slice when cold. The texture is quite chewy. The cake lasts 2 - 3 days stored airtight and it make a great dessert base topped with fruit and ice-cream or can be grilled or toasted.

Thank you so much for the recipes.