What a coincidence. In a different thread I mentioned this to somebody and actually found the treatise on the internet. Here it is:
Thanks. I'm already very familiar with the treatise but I appreciate people who actually go to the trouble to look for them. Not many do.
My point stands though -- Jerome's position didn't become popular until around 300 AD while Helvidius's position was the position of the early church. If I recall correctly, Jerome's defense was written around 380 AD.