sentences:  The dolmen stands within a few metres of the Le Couperon guardhouse, which was built in 1689, and which for more than a century off-and-on housed the garrison of a nearby battery.When Jacquetta Hawkes wrote "The Archaeology of the Channel Islands", she mentioned "the Beaker people" who spread across Europe, possibly from the Iberian peninsula.They were defined by a distinctive pottery style - a beaker with a distinctive bell-shaped profile - that spreads across the Western continent around 2000 B.C.