The surname Murchison was first found in Inverness, where they held a family seat from very ancient times. They are believed to be descended from Murdoch, a natural son of Angus Mor of Islay of the Clan Donald.
Tunneling means that a wound has channels extending from the central injury into the surrounding tissue, such as muscle and skin. These tunnels inhibit the wound's healing rate, as the flesh is unable to maintain contact long enough for the mending process to initiate.
Measure length first at the longest section then width at the widest section then depth at the deepest section. To measure depth gently insert a cotton swab and were your fingers meet the edge of the wound measure that area on the cotton swab. If depth can't be measured but the wound is open then mark it as <0.1 cm. This tells the next person measuring that is is superficial. To check for tunneling take the cotton swab and gently run it along the inside of the wound edge, if tunneling is found measure like you did the depth.