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one of thofe Greek Coins above mentioned is here 
annexed (a), with which I was favoured by our ho- 
noured Prefident. And it is well known, that the 
Monogram, which appears on it, was afterwards 
applied to a very different Purpofe by the Emperor 
Conftantine the Great, who made ufe of it to de- 
note the Name XPICTOC, and placed it both on 
his Coins and military Enligns; wherein he was fol- 
lowed not only by fome of the fucceeding Emperors, 
but alfo by private Perfons, who out of Devotion pur 
it on their Lamps and other Utenfils [b). But after- 
wards it came to be ufed merely as a critical Note, 
to point out remarkable Paflages in Manufcripts ; as in 
later Times an Hand, with the Fore -finger extended, 
has been placed for the like Purpofe in the Margin 
of printed Books. And then it flood for the initial 
Letters of the Greek Word XPHCIMON, ufeful 
as we learn from Ifidore (e). Other Inftances might 
be produced of the like Nature, wherein Things have 
deviated from their original Ufe, and ferved different 
Purpofes; but I forbear giving further Trouble to 
this Aflembly on fuch minute Matters, and hope the 
Nature of the Subjed will plead my Excufe, for 
what has been faid already. 
I fhall only beg Leave to communicate the Copies 
of two antient Dates in Arabian Figures, which were 
imparted to me by the Reverend Dr. William Warren , 
Senior Fellow of Trinity-Hall in Cambridge . They 
were both taken by himfelf, and are of the fame 
(a) See Tab. Figure II. (b) CzYzWusDefacrisChriJJjaK. ritibus y 
p. 227. Pignorius De Servis , p. 32. ed. 1674. Qttavo. (e) Oris- 
lib. 1. cap. 20. 
Size 
