On the frontispiece is another chronogram:—
"chrIsto aDhærens non aMbVLat In tenebrIs."
Mr. Hilton has succeeded in finding several additions to the small store of chronograms in English, and has produced some new ones.
On the back of the title-page of the first book is this inscription:—
"An eXCeLLent neVV book of ChronograMs gathereD together & noVV set forth by I. hILton, F.S.A. = 1882."
On the second book:—
"Another qVIte neVV book of rIght eXCeLLent chronograMs IssVeD by I. hILton, F.S.A." = 1885.
More difficult than chronograms are Greek dates, because each letter in Greek has a numerical value, and the numbers do not follow in an uninterrupted series, because certain additional figures are introduced. It is therefore often necessary in cataloguing Greek books to refer to a table such as the following:—
| A αʹ | 1 | Ι ιʹ | 10 | Ρ ρʹ | 100 | ||
| Β βʹ | 2 | Κ κʹ | 20 | Σ ςʹ | 200 | ||
| Γ γʹ | 3 | Λ λʹ | 30 | Τ τʹ | 300 | ||
| Δ δʹ | 4 | Μ μʹ | 40 | Υ υʹ | 400 | ||
| Ε εʹ | 5 | Ν νʹ | 50 | Φ φʹ | 500 | ||
| ςʹ | 6 | Ξ ξʹ | 60 | Χ χʹ | 600 | ||
| Ζ ζʹ | 7 | Ο οʹ | 70 | Ψ ψʹ | 700 | ||
| Η ηʹ | 8 | Π πʹ | 80 | Ω ω' | 800 | ||
| Θ θʹ | 9 | Ϟ ϟ | 90 | Ϡ | 900 |