Celsissime praesul ac princeps
Subtitle: Nota esse arbitramur caritati tuae Acta et decreta synodi cleri romano-catholici Provinciae Ultrajectensis celebratae anno M.DCC.LXIII. anno sequenti publicam in lucem typis edita
Published: 1767
Place of publication: Utrecht
Language: lat
Notes: Dated at Utrecht, 1 May 1767 & signed in ms. "Petrus Joannes Archi Episcopus Ultrajectens."; wax seal affixed.

This letter was also printed with the address "Eminentissime s.r. ecclesiae cardinalis" and with the caption "Epistola encyclica illustrissimi archiepiscopi ultrajectensis, nomine cleri batavi, ad il. archiepiscopos & episcopos &c. ecclesiae catholicae".

No.23 in a volume of Janseniana.