code: @Override
  	public BasicLogRecord next() {
  		if (!isForward) {
  			currentRec = currentRec - pointerSize;
  			isForward = true;
  		}
  		if (currentRec == 0)
  			moveToNextBlock();
  		currentRec = (Integer) pg.getVal(currentRec, INTEGER).asJavaVal();
  		return new BasicLogRecord(pg, new LogSeqNum(blk.number(), currentRec + pointerSize * 2));
  	}
docs: Moves to the next log record in reverse order. If the current log record
  is the earliest in its block, then the method moves to the next oldest
  block, and returns the log record from there.
  
  @return the next earliest log record