Robert Keyes and his family moved to Princeton, Massachusetts in 1751. They purchased a large tract of land, some 200 acres, on the South-Eastern slope of Wachusett Mountain. On April 14, 1755, Keyes's daughter Lucy, who was 4 years old at the time, followed her sisters to fetch some sand from Wachusett Lake. Lucy never returned from the lake. She vanished in the woods that day never to be heard from again. The towns-people made every effort to find the girl. Search parties combed the woods, the lake was dragged, all to no avail. Martha Keyes, Lucy's mother, was pushed to the edge of insanity by her grief over losing her daughter. Every evening she searched the woods calling her daughter's name. Martha died in 1786. She never found Lucy. Several years after the deaths of both Martha and Robert Keyes, a letter was found describing, in gruesome detail, the murder of little Lucy Keyes. The letter was from Tilly Littlejohn, the Keyes's hermit-like neighbor, who was furious over a property line quarrel with Keyes. To cleanse his dying soul he admitted on his deathbed that he found the girl, Lucy, in the woods and killed her by hitting her on the head with a rock. He then stuffed her body in a hollow log and waited until nightfall to return and bury her body under an uprooted tree. Many people believe that Martha Keyes has every reason to haunt the wooded hillsides of Wachusett Mountain calling, "Lu - cy, Lu - cy", since she never learned the grim fate of her daughter. And witnesses still experience the spirits of both Martha and Lucy Keyes to this day.