Part of the county at the confluence of the Concord and Merrimack rivers, about 25 m.
Its centre is Monument Square, in Merrimack Street, where are a granite monument to the first Northerners killed in the Civil War, Luther C. Ladd and A.
Minerals.-The most important of the mineral products of New Hampshire, which has long been known as " the Granite State," is granite, which is quarried in the southern part of the state in the area of " Lake Winnepesaukee gneiss," near Concord, Merrimack county, near Milford, Hillsboro county, and E.
JOHN GREENLEAF WHITTIER (1807-1892), America's " Quaker poet " of freedom, faith and the sentiment of the common people, was born in a Merrimack Valley farmhouse, Haverhill, Massachusetts, on the 17th of December 1807.
He was on Governer John Letcher's advisory committee of three voting to raise the Merrimack and he became the head of coast, harbour and river defences.