1 ■ ' 1 
II. CbferVations concerning the Subterraneous Trees 
in Dagenham^ and other Marfhes bordering upon 
the Q^i'Ver of Thames, in the County of EfTex* 
*By the ^eVd. Mr. W. Derham, Rettor of Up- 
minfler in the fatne County , and F. ^ S. 
''T' 1 HE Royal Society having fome time fince laid their 
s j[_ commands upon me* to give them an account 
ot the Subterraneous Trees , uncovered by an Inundation 
of the River of Thames in Dagenham and Havering 
Marbles. not far from me $ and having lately received 
a renewal of the fame commands, my Duty and great 
Relpe&s to that moft Illuftrious Body, oblige me to 
give the beft Relation I can of the Observations I have 
had fbme good Opportunities of making about that 
Matter. And I hope fuch an Account may be the more 
acceptable, by reafon it hath relation- to a different fort 
of Subterraneous Trees* and a way of interment of 
them, varying from what is remark’d by two very Inge- 
nious Members of the Royal Society , the Right Honou- 
rable the Earl of Cromertie , and Dr. Sloane- 
The Inundation happened between Four and Five 
Years ago, by a Breach in the Thames Wall, at an 
extraordinary high Tide: And by means of the great 
violence of the Water* a large Channel was torn up, or 
Paflage for the Water of 100 Yards wide, and 20 Foot 
deep in fome Places $. and in fome more, feme lefs. By 
which means a great, number of Trees were laid, bare,, 
that bad been. there, interred, many Ages, before. 
Xb& 
