I'm having trouble finding a complete collection of all the volumes.
Since it's an original source history collection I'd like to ideally get the lot and read through them over time.
I'm sorry if this isn't the appropriate place to ask, But I thought this was the best place suited to the question.
I've tried Ebay, Amazon and there are no consistent collections or sometimes there are volumes missing.
I'm not sure about buying it, but it's possible you could work something out with a local university or municipal library to borrow it. Look into the summit library network. I just checked for my region and Seattle University, Willamette University, Whitman College and a couple others all have it. Give me your zip-code and I can check libraries near you.