For several reasons, we date this event to January in spite of Myrtle's explicit declaration in Chapter 2.XVI that it took place in February.  We know that Fairgrove (Carey's plantation) was possessed by the military "at the end of December" [Chapter 2.IV].  Carey became ill "immediately after his enforced return to Charles Town" [Chapter 2.IV] and his sickness lasted for "a fortnight".  Myrtle identified Mandeville four days later, as we find by counting days in Chapter 2.V.  So it can't be as late as February.

Furthermore, the final sentence of Chapter 2.V tells us that the confrontation between Myrtle and Mandeville occurred a month before February 22, when Rutledge told Moultrie to question Myrtle.

The year 1911 saw the publication of the fourth edition of A Guide to the Best Historical Novels and Tales.  Sabatini had not been mentioned in previous editions, but now many of his novels were listed and he was treated quite favorably.  ("Among the most deservedly popular of recent imaginative writers I may specify Rafael Sabatini…", p. xii.)  The author's name:  Jonathan Nield [sic].  Coincidence?