1d 
lying stones were used in determining the Vernal Equinox and 
the two mounds were used for the determination of the Autumnal 
Equinox: also that in this paper I only mention sunrise 
observations, although of course the same stars, the same 
alignments and the same observations would serve if made at 
sunset at Spring that served when made at sunrise in the 
Autumn, or at sunset in the Autumn that served when made at 
sunrise in Spring. But it is certain that sunrise would, 
unless clouded, afford a far better observation than would sunset 
because the observer could make sure of his star before it 
had paled in the light of dawn, and he need never lose it till'the 
brighter light of sunrise altogether extinguished it, And on the 
other hand it would be a very difficult matter indeed to catch the 
light of the star at the moment of sunset, or, indeed, for some 
time after sunset, owing to the glow of the evening twilight. 
a HYDRA AND SOUTH MOUND. 
Toreturn toa Hydre, It is astar of only the second magnitude. 
But it is a notable star by reason that it has no competitor within 
several degrees on either side. And the glory of a star depends 
greatly on its standing alone. Thus, when we look at the 
constellation Orion, we are so struck by the magnificence of the 
constellation as a whole that our attention is distracted from the 
splendour of its component stars, as Betelgeuze, Bellatriz, Mintaka 
or htigel. Now the correct Arabic name for a Hydre is Al 
Phard, which means the lone or solitary one, and this name 
admirably describes its character. The line to the South mound 
Starts from the West edge of No. 60, and grazes the edges of 
Nos. 50 and 10. The angular distance from the East which this 
line bears is 72° 7’ 14”. If we deduct this from 180° because, 
the star being seen in the Autumn, the position of our East 
with reference to the stars, is then the exact opposite to 
what it was in the Spring, we obtain 107° 52’ 46”, which, divided 
by 15 to reduce it to hours, yields 7" 11™ 31%, and this was the 
