Hi Siddieswans - it's a small world!!!  Last night I was trawling the net again on the hunt for information on these pieces, I came across a Melbourne auction house that sold some pieces of 'Harvey School' pottery, there was a vase described as "R. E. Rookwood Harvey School Australian pottery vase" so I'm thinking I've found the R.E.R? (I did ask how it was known the pieces were Harvey School and was told the vendor was in QLD and the pieces were originally going into a museum)