sandy shores he haunted?

Master Clement Downing, midshipman aboard the Salisbury, wrote a book
after his return from the cruise to Madagascar, whither the Salisbury
had been ordered, to put an end to the piracy with which those waters
were infested. He says:

"At Guzarat I met with a Portuguese named Anthony de Sylvestre; he came
with two other Portuguese and two Dutchmen to take on in the Moor's
service, as many Europeans do. This Anthony told me he had been among
the pirates, and that he belonged to one of the sloops in Virginia when
Blackbeard was taken. He informed me that if it should be my lot ever
to go to York River or Maryland, near an island called Mulberry Island,
provided we went on shore at the watering place, where the shipping used
most commonly to ride, that there the pirates had buried considerable
sums of money in great chests well clamped with iron plates. As to my
part, I never was that way, nor much acquainted with any that ever used
those parts; but I have made inquiry, and am informed that there is such
a place as Mulberry Island. If any person who uses those parts should
think it worth while to dig a little way at the upper end of a small
cove, where it is convenient to land, he would soon find whether the
information I had was well grounded. Fronting the landing place are five
trees, among which, he said, the money was hid. I cannot warrant the
truth of this account; but if I was ever to go there, I should find some
means or other to satisfy myself, as it could not be a great deal out
of my way. If anybody should obtain the benefit of this account, if it
please God that they ever come to England, 'tis hoped they will remember
whence they had this information."

Another worthy was Capt. Edward Low, who learned his trade of