_Æneas Silvius (Pope Pius II.)._--A broadsheet was published in 1461,
containing the excommunication and dethronement of the Archbishop and
Elector Dietrich of Mayence, issued and styled in the most formidable terms
by _Pius II._ This broadsheet, consisting of eighteen lines, and printed on
one side only, appears from the uniformity of its type with the _Rationale_
of 1459, to be the product of _Fust_ and _Schöffer_.
No mention whatever is made of this typographical curiosity in any of the
standard bibliographical manuals, from which it seems, that this broadsheet
is UNIQUE. Can any information, throwing light upon this subject, be given?