a piece from the article: "two slingers revive ancient skill"
wednesday,april 19,1972
by George Ferguson

"You start the throw with an underhand motion,as one would throw a softball. You swing up and once around around your head then follow through as a baseball pitcher would throw"

so it may look like  byzantine style
or
my translation by being strict with the description:
the movement is like balearic at the start and continuous like a fig-8
or
upside down balearic (kind of...)

i tried it and its strange
it produces strange spin (i couldn't spot) on the stone and the plane of the throw is turned placing the stone towards the left for right handed slinger

so what is your translation of the description what style is it or what you think it looks like?
can you try it and spot the spin produced ?

below is the article i copied and scaned in the past i couldn't find the source page ,sorry for the bad quality

here http://paperlined.org/dev/oss/high_energy_slings/ you can see the range records since slinging.org is down...

If the pitcher is throwing overhand, i'd say helicopter. If he is thowing sidearm, balearic.

It sounds to me like he is talking about the fig-8.

When he says "you start the throw with an underhand motion, as one would throw a softball" what I think he is referring to is the backward motion, when you drop the pouch.



"You swing up and once around your head and follow through as a baseball pitcher would throw"

I could be wrong, but it makes the most sense.

It's the second half of fig 8,

So yeah, pretty much what's called byzantine. 

do it with an invisible sling.

Interesting - I have been working on a similar style. To me, a figure 8 is counter-inuitive b/c you cross-the midline when the sling is behind your back.  In the Vernon Morton style, it seems that you cross the mid-line when the sling is in front of you.

@Parmenion - An imaginary line dividing the body into right and left halves.

I think it's like this: https://youtu.be/WFsiRGghfI0