NATURAL HISTORY AND PHYSIOGRAPHY OF NEW BRUNSWICK. 451 
on the rivers. I have already mentioned in these Notes, however 
(No. 101, in Bulletin No. XXV, 1908, 522) that the head of tide 
on the Tabusintac is considerably above the position assigned 
it on the old plans of the Crown Land Office. I have been told, 
also, by the residents of the Petitcodiac that the head of tide 
on that river has moved over a mile up the river within historic 
times. But my best piece of evidence consists in a survey plan 
and document, later to be published in the Collections of the 
New Brunswick Historical Society , which shows that the head 
of tide on the Main Southwest Miramichi in 1786 lay consider- 
ably below its present position, which is close to the mouth of 
the Renous, or a little above. The plan marks “Rapids” 
nearly half a mile below the Renous, where now the tide flows 
without any break. I have not found any case showing a lower 
position of the tide on any of our rivers. I am well aware that 
such tidal evidence would be viewed with particular suspicion 
by Professor Johnson, but nevertheless I think it well worth 
collecting, and I hope later to report more fully and accurately 
upon this subject. 
Second, there is one very interesting, and possibly significant, 
feature in common to all of the evidence bearing upon this 
question of subsidence, namely, — all of the many items, no 
one of which by itself may be conclusive, point in the same 
direction, viz., towards a subsidence of the coast. None of 
the items indicate an elevation. If the evidence is illusory, 
one would expect a part of it to point in the other direction. 
