Bench Mark

Cooties in the UK are called parasites. This parasite started life in Yorkshire, England. Parasites pass from personal traveller to personal traveller. Please do not put out in a fixed letterbox.

Bench Marks

are common to both the United Kingdom and the United States.

Benchmarks are used to establish vertical height above sea level. The term benchmark originates from the chiseled horizontal marks that surveyors made into which an angle-iron could be placed to bracket (bench) a levelling rod, thus ensuring that the levelling rod can be accurately repositioned in the same place in the future. These marks were usually highlighted with a chiseled arrow below the line and may be chiseled into a wall, or marked by small brass or aluminium disks, concrete posts, iron pins or bolts that are permanently attached to a stable foundation such as a boundary stone or wall.

Triangulation points, also known as trig points, are marks used to establish horizontal position. In the United Kingdom triangulation points are often set in small concrete markers, which as well as functioning as a triangulation point, also have a benchmark set into the side of the monument.

http://en.wikipedia.org/wiki/Triangulation_pillar