Great news. I heard from William last night, and have already forwarded his letter to Fred! 
Here's what he wrote to me:
Marion, my son-in- law came across this message.......on the VI Corps Combat Engineers, the message is listed below:
William Shaw here. This message might refer to me. my old e mail was (I omitted it), but my server changed it address to (left off for privacy) more than a year ago. My e mail (alias ) listed in the GAN (Golden Acorn News ) was (left off for privacy)
(This is why I try to use my alias, Because if my ISP changes my alias won't. )
And yes I did do my basic training at Fort Benning Ga.: with the 13th Co. 4th Regt. ASTP BTC
And was assigned to the 87 Division, "C" Company 347 Inf Regt at Fort Jackson SC. I was the only one in 13th Co. 4th Regt. ASTP BTC by the name of William Shaw.
Note I am, I think, a member in good standing with:
Golden Acorn News published by the 87th Infantry Division Legacy Association or GAN-LE.
But the name Mr. GSD does not ring a bell. Will you be so kind to forward this message to him ?
Proud Daughter of Walter (Monday) Poniedzialek
540th Engineer Combat Regiment, 2833rd Bn, H&S Co, 4th Platoon
There's "No Bridge Too Far"