Correspondence Register, Eckel & Aldrich Architects, 1931-1934 Correspondence in portfolio. Typed carbon copies of letters written by Eckel & Associates, filed in alphabetical order by addressee. Written to suppliers and clients. Initials of E.J. Eckel, Will S. Aldrich, and George Eckel on letters, but no signatures. The letters include the day and month but not always the year.