Cmdr. Gerald L. Ketchum, USN
Burton Island used her four-bar single-circle postmark (figure 1) throughout the expedition. Two straight-line ship's name rubber stamp markings appear quite regularly on the reverse of Burton Island mail from Highjump (figures 2,3).
rubber stamp reading, "NAVY ANTARCTIC / EXPEDITION / OPERATION
HIGHJUMP" (figure 4) has been seen on some Burton Island covers.
This is believed to be of private origin and never used by Highjump
personnel. (For another use of this handstamp, see USS
CANISTEO and USS