The pictures you see on this page, the ones that accompany the poem "Mending Wall", and the ones that accompany "The Road Not Taken", were photographed on the Robert Frost Farm, in Derry, New Hampshire.     Frost lived on this 30 acre farm in the southeastern corner of the state from 1900 to 1911. Although he lived in England when he wrote "Mending Wall" in 1913, it was on this farm where he would "meet to walk the line and set the wall between us once again" with his neighbor Napoleon Guay.     "Hyla Brook" can also be found on the farm in Derry. The poem was written in 1906 while Frost lived on the farm. The brook was named after the "spring peepers", which are tiny frogs that are aptly described by their annual springtime "mating call".