That is it. No gravel, no kerbing, no engineering ambition beyond the immediate problem of crossing soft terrain. And yet those planks are a togher, a category of ancient Irish trackway built to carry people and animals across the waterlogged midland bogs that would otherwise have been impassable.

Toghers were constructed across Ireland for thousands of years, from the Neolithic period well into the early medieval era. They range from elaborate affairs of split timbers, pegs, and brushwood to the most basic arrangements of laid planks, and this example at Derrindiff falls into the latter category. Classified as a class 3 togher, it measures just eighteen centimetres wide and ten centimetres deep, which suggests something closer to a stepping path than a road in any modern sense. The use of oak is typical; it resists decay far better than most native timbers, and the anaerobic conditions of a raised bog can preserve it for centuries or even millennia. The exact age of the Derrindiff planks is not recorded in what is known about the site, but the find was documented as part of systematic wetland survey work carried out by the Irish Archaeological Wetland Unit at University College Dublin, an effort to catalogue the remarkable concentration of bog trackways found across the Irish midlands before drainage and turf-cutting could remove them from the record entirely.