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I was able to resolve this with:

\documentclass[10pt,letterpaper]{book}
\input gloss
\begin{document}
\gloss Canis, natans per flumen,\footnotemark[1]
A-dog, swimming through a-river,
\unhbox\gline
\footnotetext[1]{blah}
\end{document}

I didn't realize footnotes didn't work in tables. Thanks for ...

I am working with a Midnight Macro file gloss.tex
http://mirrors.ctan.org/macros/generic/midnight/gloss.tex

This allows you to have word by word glosses for linguistics:

\documentclass[10pt,letterpaper]{book}
\input gloss
\begin{document}
\gloss Canis, natans per flumen,
A-dog, swimming ...