The cover is send from St..Thomas to Christiansted. I have only located three covers dated January 23 with postmark Christiansted.
St.Croix cancels dated earlier (February 11)
The early cancels are the result of the post office practics associated with the public´s use of letterboxes located on board mail-carryind ships. The earliest recorded
cancels from St.Croix is Christiansted January, 23 and Frederiksted on February 7. Both were mailed from St.Thomas without being canceled there.
In making this statement it becomes important to detail certain DWI Post Office practices to verify the
origin of letters mailed in 1903 and how the domestic mail routing is determined by examining the multiple postmarks on an envelope.
Covers are commonly seen with the cancel from on post office on the stamp, and as many as two different cancels
on the back of the envelope. The stamp was canceled by the first post office to receive the letter, and the cancels on the back are a combination of transit and arrival cencels.
Mail from Frederiksted to St.Thomas will have the stamp canceled
in Frederiksted. From there it went by mule-wagen to the Christiansted Post office that canceled the back, and then by ship to Charlotte amalie where the St.Thomas cancel was back-stamped. Alternately mail could have gone by ship directly to St.Thomas and
the back would only have a St.Thomas cancel.