At each stage is a Blue Plaque. There are 8 plaques around Blue Town, but this takes you to 6 (numbers 1-6) only.
At each waypoint you need to collect some numbers to give you the final location of the cache.
The cache can be found at...
N51 A B . C D E
E000 F G . H H J
Good luck and enjoy the mini tour of this interesting little town...
Waypoint 1
You should be looking at a Blue Plaque on the wall, "Location Point 3"
From this plaque...
A = The County Court House was completed in 185(A)
B = The South Gate constructed in 18(B)1
Waypoint 2
You should be looking at a Blue Plaque on the wall, "Location Point 1"
From this plaque...
C = The Pier closed to the public in 19(C)(C)
D = (y-z) where...
The White Chapel was built by dockyard workers in 17(y)(z)
Waypoint 3
You should be looking at a Blue Plaque on the wall, "Location Point 2"
From this plaque...
E = The Fountain was built in 18(E)7
G = How many '8' eights are there in the dates on the whole plaque
Waypoint 4
You should be looking at a Blue Plaque on the wall, "Location Point 4"
From this plaque...
F = How many '1' ones are there on the entire plaque (dates and elsewhere)
Waypoint 5
You should be looking at a Blue Plaque on the wall, "Location Point 5"
From this plaque...
H = How many years are there in number form on the whole plaque (e.g. 1901)
Waypoint 6
You should be looking at a Blue Plaque on the wall, "Location Point 6"
From this plaque...
J = (v+w+w) where...
Blue Town suffered two large fires, 18(v)7 and 18(w)0
The cache can be found at...
N51 A B . C D E
E000 F G . H H J