In
to these inquisitive Gentlemen, who have many of them made Enquiries of me by Letter, I must tell them the Reply of an ancient Philosopher, who carried something hidden under his Cloak. A certain Acquaintance desiring him to let him know what it was he covered so carefully;
I cover it,
says he,
on purpose that you should not know
. I have made use of these obscure Marks for the same Purpose. They are, perhaps, little Amulets or Charms to preserve the Paper against the Fascination and Malice of evil Eyes; for which Reason I would not have my Reader surprized, if hereafter he sees any of my Papers marked with a Q, a Z, a Y, an &c., or with the Word
Abracadabra
.