▁but ▁just ▁east ▁of ▁the ▁historical ▁resident ial ▁part ▁of ▁town . ▁It ▁lies ▁along ▁the ▁southern ▁margin ▁of ▁the ▁H ors es ho e ▁Lake ▁me ander ▁just ▁north ▁of ▁the ▁East ▁St . ▁Louis ▁M ound ▁Group ▁of ▁earth works . ▁By ▁the ▁end ▁of ▁the ▁ 2 0 0 7 ▁field ▁season , ▁the ▁team ▁had ▁exc av ated ▁ 7 , 0 0 0 ▁pre histor ic ▁features , ▁making ▁this ▁one ▁of ▁the ▁largest ▁sites ▁ever ▁exc av ated ▁in ▁the ▁USA . ▁Most ▁of ▁these ▁features ▁are ▁associated ▁with ▁the ▁Late ▁Wood land ▁Patrick ▁phase ▁and ▁early ▁Terminal ▁Late ▁Wood land ▁Lloyd ▁phase , ▁approximately ▁from ▁ 6 0 0 ▁AD ▁to ▁ 1 2 0 0 ▁AD . ▁They ▁suggest ▁a ▁more ▁complex ▁and ▁dense ▁ind igen ous ▁community ▁than ▁research ers ▁had ▁known ▁lived ▁in ▁the ▁area . ▁ ▁In ▁association ▁with ▁its ▁work , ▁the ▁Illinois ▁State ▁Arch ae ological ▁Survey ▁( IS AS ) ▁( former ly ▁IT AR P ), ▁a ▁joint ▁project ▁of ▁the ▁state ▁and ▁the ▁University ▁of ▁Illinois , ▁conducted ▁out re ach ▁with ▁the ▁village ▁of ▁Brook lyn , ▁volunte ering ▁to ▁survey ▁some ▁of ▁the ▁areas ▁associated ▁with ▁its ▁early ▁ 1 9 th - century ▁history . ▁A ▁team ▁of ▁arch ae olog ists ▁led ▁by ▁Dr . ▁Joseph ▁Gal loy ▁found ▁evidence ▁of ▁early ▁Af ro - American ▁occupation ▁from ▁ 1 8 3 0 ▁to ▁ 1 8 5 0 , ▁as ▁well ▁as