Ashridge has been used as a filming location for its fair share of scary movies. Hot Fuzz ("The Greater Good"), Maleficent (scary if you're 8) and especially The Descent (look for an old log cabin while in the woods - it features in the film) have all had scenes shot here. This cache is a creepy nod to Ashrige's heritage of horror...
A Puzzle-type Letterbox/Hybrid cache (please don't remove the ink pad or stamp; they're not swaps) set for the 2018 Winter Geolympix - The cache is NOT at the given co-ords, but is within 2 miles of them. You have to crack a puzzle or code to locate the cache.
This cache will be 'fancy' for night caching at the local Mega in October. If you'd like to see it then, or if you'd like to do the Letter/Box Challenge you may wish to leave it until then.
Method 1: Use some AANDs (Aluminium Alpha-Numeric Discs. There are around 4,000 in circulation) and go to:
N51° 4(B+D).(AxKx(((CxH)+(G/2))+J))+E+F
W000° 3(J-G).((B+H+E+1-F)xKxDxA)+C.
Method 2: Take the final digit of the year these horrible creations made their public debut to calculate the final co-ords of this cache, using the following formula. There are larger versions in this cache's Gallery if you need a better look. Good luck!
The final is hidden at N51 4A.B W000 3C.D where:
A=(1+(32+6))x15
B=21+(7x33x(11+(24x38)))
C=((42+27)-(34+40))+(39-16)
D=(3+14+23)x(31+(30x(4-5)x(25x((2+8+9+10+12+13+17+18+19+20+22+36)))-(26+28+29+35+37+41)))
Checksums:
1+2+3+4+5+6+7+8+9+10+11+12+13+14=53
15+16+17+18+19+20+21+22+23+24+25+26+27+28=52
29+30+31+32+33+34+35+36+37+38+39+40+41+42=75
1. 
2. 
3. 
(The French novel, not the serialisation the year before, or this 1925 film version)
4. 
(In literature, not this 1931 film adaptation)
5. 
(In literature, not this film portrayal)
6. 
7. 
8. 
9. 
(You'll be hellbound if you get this wrong...)
10. 
11. 
(Not the 1967 source novel)
12. 
(In literature, not this 1958 film version)
13. 
(In literature, not this 1955 film adaptation of the same name)
14. 
(This film version, not the 1977 source novel)
15. 
(In literature, not this 1973 film portrayal)
16. 
(The original novel, not this 1973 adaptation)
17. 
18. 
19. 
(In the author's 22nd published book)
20. 
21. 
22. 
(In literature, not the 1975 film adaptation)
23. 
24. 
25. 
(The original novel, not this 1998 film adaptation)
26. 
(In literature, not this 1999 film adaptation)
27. 
(This movie version)
28. 
(This film version, not the 1958 film it's based on, or the 1957 short story *that* was based on)
29. 
30. 
(Accepting Orlok as a derivative character based on an earlier work, but a creation in its own right.)
31. 
(In literature, not this 1960 film adaptation.)
32. 
(Book or film!)
33. 
(The first in the franchise.)
34. 
(The original novel, not this 1960 film adaptation.)
35. 
(The anonymous novel, not this 1931 film adaptation.)
36. 
(The author's first published novel, not this 1976 film adaptation.)
37. 
(Mostly set in London)
38. 
39. 
(Premiered at the Cannes Film Festival and given a general release the following year)
40. 
(This film portrayal.)
41. 
(You'll be cut-up if you get this wrong!)
42. 