68 NATURAL HISTORY AND TOPOGRAPHY OF GROTON, MASS. 



Fort Mountain in Epsom would probably appear like this 

 / 'x from Groton. Blue Job I have never satisfactorily iden- 

 tified. The mountain seen in that direction you think is the most 

 distant one visible. May it not thus appear so because of its low 

 altitude, showing but little above the horizon, while Gunstock (if it be 

 Gunstock) is not only better situated for exhibition, but (without 

 computing) by its greater height may have greater apparent altitude, 

 and so a clearer profile, even though further off.' 



Yours very truly, 



E. G. Chamberlain. 



Again, in continuation of the subject, Mr. Chamberlain 

 writes, on December 20, 1893, as follows: — 



When studying the view from a hill I always used to compute 

 the azimuth, or direction to all the points whose position had been 

 determined ; and if the Latitude and Longitude of the view-point 

 had not been determined, I took measures to determine them 

 myself, so as to compute the bearings. If you have the " Appala- 

 chia " magazine in your library, you may find my methods described 

 in Volume IIL (page 122), and Volume IV. (page 132). I have 

 never visited Gibbet Hill, so I have made an approximate position 

 by comparing several maps, and have plotted on my chart with the 

 following results : — 



FROM GIBBET HILL. 

 Approximate Bearings and Distances. 



