Which preposition to use with xenocrates

in Occurrences 1%

Yet thus much I will say of myself, and that I hope without all suspicion of pride, or self-conceit, I have lived a silent, sedentary, solitary, private life, mihi et musis in the University, as long almost as Xenocrates in Athens, ad senectam fere to learn wisdom as he did, penned up most part in my study.

Which preposition to use with  xenocrates