Hollowed-out rock (Fallout 4)

Two hollowed-out rocks can be found behind the Museum of Witchcraft and contain loot and a note.

Layout
The hollowed-out rocks are behind the graves at the Museum of Witchcraft. They do not readily stand out as a container up close or at a distance, moving the Sole Survivor's view directly over the rock is required to notice it. The rock is shorter than the gravestones, nearly set into the ground. Another is in the circle of trees behind the museum and ruined house.

Contents
The rock contains:
 * several .308 round
 * Baseball grenade x4
 * Bottlecap x50
 * Bubblegum
 * Note to S from E
 * Radaway x3
 * Modded hunting rifle
 * Stimpak x3

Appearances
The hollowed-out rock appears only in Fallout 4.