TO THE 
SHIPOWNERS AND MERCHANTS 
OF THE 
POET OF LIVERPOOL. 
Gentlemen, 
In again printing and offering for your use a Paper in connection 
with Navigation, permit me to express how highly I appreciate your kindness, 
in so liberally recognizing my humble endeavours to aid the exertions of your 
zealous Captains ; and, also, again to assure you of my determination to devote 
my future exertions, to aid the advancement of the science of Navigation in 
which you, Gentlemen, are so deeply interested. 
In compiling the present paper, little amount of scientific skill is displayed. 
It consists in reducing to system the reports of your Captains and others. But 
if this should be the means, in the hands of the Mariner, of reducing the risk 
of loss of life and property, or of removing any unnecessary alarm, [ believe 
you will consider that my labors have not been in vain. 
I am, Gentlemen, 
Your obliged and humble Servant, 
JOHN THOMAS TOWSON. 
