In the mid to late 19th century , it was also known as Millville due to its mill work along the Poestenkill Creek .
Eagle Mills , in 1880 , was the largest and most important business place in the town of Brunswick .
In the mid to late 19th century , Brunswick was also known as Millville due to Brunswick 's mill work along the Poestenkill Creek .
Eagle Mills , in 1880 , was the largest and most important business place in the town of Brunswick .