2 adjectives to describe chronologers

He was likewise very liberal to Mr. Speed the celebrated chronologer: finding him a man of extensive knowledge, and his occupation and circumstances mean, so that his genius was depressed by poverty, he enabled him to prosecute his studies, and pursue the bent of his genius without being obliged to drudge at a manual employment for his bread.

"Neither, but a grave and veritable chronologer.

2 adjectives to describe  chronologers