Highest point of Friar’s Heel 239° 47′ 25″ -9 8 20 -------------- 230 39 5 or N. 50 39 5 E. Middle of opening in N.E. trilithon 238 51 10 -9 8 20 -------------- 229 42 50 or N. 49 42 50 E. The difference of 8¹⁄₂′ between this and the assumed axis 49° 34′ 18″ is so slight that considering the indirect method which has necessarily been employed in determining the axis of the temple from the position of the leaning stone, and the want of verticality, parallelism and straightness of the inner surfaces of the opening in the N.E. trilithon, we are justified in adopting the azimuth of the avenue as that of the temple. Next, with regard to the determination of the azimuth of the avenue as indicated by the line of pegs to which reference is made on p. 65. The small angle between the nearest pegs A and B (which are supposed to be parallel to the axis of the avenue), observed from station _a_, was measured, and the corresponding calculated correction was applied to the ascertained true bearing of the more distant peg B. Thus True bearing of peg B = 238° 35′ 0″ Calculated correction to peg A = 0 12 8 ------------ True bearing of line AB 238 47 8 Bearing of Salisbury Spire 189 8 20 ------------ True bearing of a line parallel to the axis of near part of avenue N. 49 38 48 E. The mean of the three independent determinations by another observer was 49° 39′ 6″. The calculated bearing of the more distant part of the axis of the avenue determined in the same manner by observations from station _b_ is 49° 32′ 54″. The mean of the two, namely, 49° 35′ 51″, justifies the adoption of the value 49° 34′ 18″ as given by the Ordnance Survey for the straight line from Stonehenge to Sidbury Hill. (3) _Observation of Sunrise._--On the morning of June 25, 1901, sunrise was observed from station _a_, and a setting made as nearly as possible on the middle of the visible segment as soon as could be done after the Sun appeared. The telescope was then set on the highest point of the Friar’s Heel, and the latter was found to be 8′ 40″ south of the Sun.