APPENDIX. 
203 
CERTIFICATE. 
We, the under- signed, Merchants, Ship-Owners, &c., residing 
at Yarmouth^ have this day, at the request of Captain Manly, 
attended an experiment of his New-invented gun-harpoon, and 
do Certify, that the Harpoon is discharged from the Gun, and 
flies with a true position, point blank, upwards of Thirty Yards, 
through an Inch Board, and, from the construction of the Lock, 
it is not probable the Gun will miss fire — and we do further 
certify, that it appears to us, from the formation of the Harpoon, 
it is not likely to draw after it has struck the Fish. 
W. Palgrave, Jun., Collr, Customs, 
Samuel Paget. 
Timothy Steward. 
Ambrose Palmer. 
Dawson Turner. 
Yarmouth, 9th Feb. 1820. 
The following figure represents the harpoon, with which 
the experiment here certified was made. It was two 
inches in diameter, seven inches in length, and weighed 
3lb. loz. The rope was fastened to it by stout strips of 
raw ox-hide, capable of enduring the powerful inflamma- 
tion of the powder without injury, and plaited very closely. 
The harpoon had a wooden cap at that end which was first 
introduced into the gun. 
The arms or withers of this harpoon were let into a mor- 
tice made to receive them, sufficiently deep to admit of 
