a. The value of the easting to the immediate left of settlement = 47
The value of the northing just south of the feature = 78
The four-figure grid reference of settlement = 4778
b. Value of easting =46
Location on subdividing = 5 (so 465)
Value of northing = 78. (so 46578)
Location on subdividing = 5 (so 465785)
The 6 figure grid reference of spring = 465785
c. i. Tube well
ii. Fort