_Chepstow Castle._--In Carlyle's _Life of Cromwell_, vol. i. pp. 349, 350.,
there is a letter from Cromwell, dated before Pembroke, wherein he directs
a Major Saunders, then quartered at or near Brecon, to go to Monmouthshire
and seize Sir Trevor Williams of Llangevie, and Mr. Morgan, High Sheriff of
Monmouth, "as," he writes, "they were very deep in the plot of betraying
Chepstow Castle." Carlyle has the following foot-note to the letter:
"Saunders by his manner of indorsing this letter seems to intimate that
he took his two men; that he keeps the letter by way of voucher. Sir
Trevor Williams by and bye compounds as a delinquent, retires then into
Llangevie House, and disappears from history. Of Sheriff Morgan, except
that a new sheriff is soon appointed, we have no farther notice
whatever."
Can any of your correspondents give me information in what work I can find
a tolerably full account of this "betraying of Chepstow Castle?" and also
of what place in the county was this Morgan, Sheriff of Monmouth?