The message is stored in the hierarchical message store at {HEAD ~ the one such index node} and {TAIL ~ the one such storage node} 
The message is stored in the hierarchical message store at { HEAD ~ the one such index node } and { TAIL ~ the one such storage node }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL