Exhibit (a)(13)

                   THIS CONCERNS YOUR EXISTING INVESTMENT IN
               PUTNAM CALIFORNIA INVESTMENT GRADE MUNICIPAL TRUST
                               (AMEX TICKER: PCA)
            THE INVESTMENT YOU MADE IN PCA MAY CHANGE DRAMATICALLY!!

BY NOW, YOU SHOULD HAVE RECEIVED A PACKAGE OF INFORMATION  CONCERNING OUR TENDER
OFFER TO  PURCHASE  ALL OF THE  SHARES OF PCA.  YOU  SHOULD  CONSIDER  OUR OFFER
IMMEDIATELY.

THESE ARE THE KEY REASONS WE BELIEVE YOU SHOULD ACT ON OUR OFFER:

     1.   OUR OFFER TO  PURCHASE IS AT THE  HIGHEST  AVERAGE  PRICE PAID FOR PCA
          SHARES ON THE AMERICAN STOCK EXCHANGE DURING THE PAST 2 1/2 YEARS.

     2.   IF WE ARE  SUCCESSFUL IN ACQUIRING A MAJORITY OF PCA'S COMMON  SHARES,
          WE WILL PROPOSE  CHANGES  INCLUDING  REPLACING THE CURRENT  INVESTMENT
          ADVISER AND CHANGING  PCA'S  INVESTMENT  OBJECTIVES,  AS WELL AS OTHER
          CHANGES  THAT  WILL  RESULT  IN  PCA  BEING  FAR  DIFFERENT  THAN  THE
          INVESTMENT YOU BOUGHT.

     3.   IF SHAREHOLDERS APPROVE THESE CHANGES, PCA WILL NO LONGER BE AN INCOME
          FUND. IT WILL LIQUIDATE ITS ENTIRE  PORTFOLIO OF CALIFORNIA  MUNICIPAL
          BONDS  AND ANY  INCOME  WILL NO  LONGER BE  EXEMPT  FROM  FEDERAL  AND
          CALIFORNIA INCOME TAX.

IF YOU DON'T WANT TO BE PART OF THIS NEW  DIRECTION,  OUR TENDER OFFER GIVES YOU
AN  OPPORTUNITY  TO SELL YOUR SHARES AT THE HIGHEST PRICE PAID IN THE LAST 2 1/2
YEARS.

                     ACT NOW WHILE YOU HAVE THE OPPORTUNITY
                     THE OFFER EXPIRES ON FEBRUARY 16, 2007

         If you have not received your materials or if you need further
              information, you may contact our Information Agent:

                               Morrow & Co., Inc.
                                 (800) 607-0088

The Mildred Horejsi Trust
January 29, 2007