In 1968 a group of the residents of Helmsley made a financial contribution to the planting of trees around the outside of the field on which Duncombe Park Football and Cricket teams play their home games.
To find the cache you need to take information from the Memorial Trees plaque
A = How many Arthur's in the right hand column
B = Number of letters in the 3rd christian name in the left hand column
C = Sir Herbert ? - number of letters in the surname
D = Benjamin Frank ? - number of letters in title
E = Fred & ? Leete - number of letters in second christian name
The cache is located at N54 1Z.YXW W001.0V.UTS
Where Z=(B-D), Y=A, X=(E-B-D), W=(B-C), V=(B-A), U=D, T=(E-C) and S=(A-D)