Conclusion
The church of the first three centuries, indeed, did not possess a real presence doctrine; the writings of the church fathers from that era certainly portray that. In particular, Clement of Alexandria and his student Origen explicitly deny that such a doctrine could have existed.
*The real presence doctrine of the Catholic Church was, in fact, unheard of in the early centuries of the Christian church. It is interesting to think about how central the sacrifice of the mass is in Catholicism, and yet nowhere in early church do we find direct reference to it; only obscure evidence that, when taken in context, proves to be evidence to the contrary.