\documentclass[12pt]{letter}
\righthyphenmin = 3
\lefthyphenmin = 2
\begin{document}
\raggedright

\address{
Burton Rosenberg\\
Robert Chen\\
Dept's of Math and of Computer Science\\
University of Miami\\
Coral Gables, Fl 33124
}

\signature{Burton Rosenberg\\
Assoc Prof, Comp. Sci.}

\begin{letter}{
Jon Wellner\\
John Marden\\
Editors, The Annals of Statistics\\
University of Washington\\
Department of Statistics\\
Box 354322\\
Seattle, WA 98195--4322
}


\opening{Dear Sirs}


Please consider the attached paper, Inferring model parameters
in markets with collars, for publication in The Annals of
Statistics. We have sent this paper electronically a couple of weeks
ago, but have not had a confirmation that the paper has
reached you. Please excuse the trouble if the paper had reached
your email as a pdf, and this then would be a duplicate.

\closing{Respectfully}
\end{letter}
\end{document}

