R.D Kirkpatrick 1964 Mus musculus Sand Island, Johnston Atoll, Pacific Nov 5:30 P.M. 27 traps were set in 15 a line SE of the tall tower. (cont) 10 PM The grid traps were set. 23 of the 27 other traps had mice in them. I took them to the barracks Nov. 8 AM. 47 Mus (3 of them unmarked) 16 were caught on the grid. The remaining 4 traps set SW of the tall tower had mice in them. We weighed, measured, autopsied, and processed 21 mice. Two additional mice were found to be toe clipped- they were returned to the grid and released. They were #s 486 and 469. 9:30 PM The grid traps were set and 23 other live traps were set in a line running NE from the tall signal tower. Nov. 8 AM. 41 Mus were in the grid traps. 17 All were already marked. 8:30 AM. 19 Mus were in the 23 traps set NE of the tower. 21 Mus were autopsied and processed. Mus # 252 and 202 were caught in the 2nd string of traps. They were released on the grid. 10 AM, 26 traps were set plus 27 others South of tower.