( 4M ) 
“ t he faid I Hand, in order to make ah Experiment at 
a Sea of a Machine call’d the Marine-Surveyor , pro- 
“ je&ed, to the beft of their Knowledge, by Mr. 
“ Henry de Saumarez, of Guernfey ^ which Invention 
Ci is intended to corred the many Errors of the Log, 
“ &c. And they further declare, that they have not 
“ only throughly view’d, confider'd, and examin’d the 
c - laid Machine, but have alfo made feverai Experi- 
“ ments of it in a rough Sea, fometimes failing right 
“• before the Wind, then quartering y at other Times 
“ turning to Windward, and then lying by to know 
“ the Drift of the Ship both with and againft the 
“ Tide: That having tried the fame Invention all 
“ Manner of Ways, they bnd it much preferable to 
“ the Log , or any of the Methods in ufe for ob- 
“ taining the Ship’s Diftance run, having nothing to 
“ object againft it, as to its being a Clog or Hindrance 
« to the failing of the Ship &c . That being fully 
“ fatished of the great Ufefulnefs of this Invention 
* for the Improvement of Navigation, and the Service 
it may be of to ail the Maritime Powers, thev 
«• publickly atteft the Truth of the above-mentioned 
Particulars, to the End the Author thereof may 
« make fuch Ufe of it, as he (hall think moil proper. 
« In witnefs whereof, the Seal of the Royal Court of 
Guernfey is hereunto affix’d by us the underwritten, 
“ Signed by the Judge Delegate end Jurats, as 
“ above-mentioned. 
Here you have fame Proof of the Ufefulnefs of this 
new Invention, and that from Seamen of long Stand- 
ing and Practice : But, notwithftanding thefe I eftimo- 
niais, I was yet determined to have it tried further : 
Accordingly I made a Prefent of one of my Machines 
\o a Friend of min^, Captain John Thoinnes , whobe- 
(ides 
