Which preposition to use with hajjis

of Occurrences 1%

" As Hajjis of approved experience, the persons who led the advance in this little procession, were subjects of a proper attention and respect; but as the admiration of mere vulgar travelling would in itself be vulgar, care was taken to reserve the condensed feeling of the company for the celebrated English writer and wit, who was known to bring up the rear.

Which preposition to use with  hajjis