In 1863, while directing the excavation of the Mané er Hroek tumulus, René Galles decided to excavate another tumulus in the municipality of Locmariaquer: Mané Lud. This tumulus is 90 metres long, 50 metres wide, and approximately 6 metres high. Today, the tumulus is well-preserved and almost intact, although the sides have been cut into by houses and a road in places.
The excavation revealed a small burial chamber built of stones without an access passage, containing poorly-preserved bones, pottery fragments and flint artefacts. Beneath the tumulus there is also a dolmen, on the western side; this appears to have been added later. Some of its slabs are engraved. These engravings have been identified as axes and boats, together with a sperm whale on the stele at the back of the chamber. A staircase installed after the excavation leads down into the dolmen.
The Mané Lud tumulus and dolmen are 100 metres from the Er Grah tumulus and the Table des Marchands site. Visitors on foot have to make a slight detour to get from one site to the other; the Mané Lud tumulus can also be reached by a footpath from the car park 150 metres to the west.