Which preposition to use with leverrier

in Occurrences 2%

Adams, in his study at Cambridge, England, and Leverrier in his closet at Paris, poring over their logarithms, knew better the locus of that outside planet than all the practical astronomers of the world put together....

of Occurrences 1%

ADAMS, JOHN COUCH, an English astronomer, the discoverer simultaneously with Leverrier of the planet Neptune (1819-1892).

Which preposition to use with  leverrier