Footnotes of footnotes (LaTeX2e unofficial reference manual (November 2018))

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### 11.6 Footnotes of footnotes

Particularly in the humanities, authors can have multiple classes of footnotes, including having footnotes of footnotes. The package `bigfoot` extends LaTeX’s default footnote mechanism in many ways, including allow these two, as in this example.

    \usepackage{bigfoot}    % in preamble
    \DeclareNewFootnote{Default}
    \DeclareNewFootnote{from}[alph]   % create class \footnotefrom{}
     ...
    The third theorem is a partial converse of the
    second.\footnotefrom{%
      First noted in Wilson.\footnote{Second edition only.}}

Unofficial LaTeX2e reference manual