DETWILER MITCHELL & CO
PROMISSORY NOTE
<DOCUMENT>
<TYPE>EX-10
<SEQUENCE>3
<FILENAME>ex101302.txt
<DESCRIPTION>PROMISSORY NOTE
<TEXT>

                          EXHIBIT 10.13

                         PROMISSORY NOTE

$300,000.00                                      March 22,  2002


     FOR  VALUE  RECEIVED, Detwiler, Mitchell & Co.,  a  Delaware
corporation  ("Maker"), promises to pay to JAMES  H.  GRAVES,  an
individual  ("Holder"), at Boston, Massachusetts,  the  principal
sum of THREE HUNDRED THOUSAND DOLLARS ($300,000.00) plus interest
thereon  at  a  rate of 10% per annum from the date hereof  until
paid on the terms set forth below.

Maturity  Date.  The unpaid balance of this Note and all  accrued
but unpaid interest shall be due and payable on May 22, 2003 (the
"Term").

Prepayment.   Maker  reserves  the right  to  prepay  the  unpaid
principal  balance  and  any accrued  interest,  or  any  portion
thereof, at any time without penalty.  Each such payment shall be
credited  first  to interest then accrued and  the  remainder  to
principal, and interest shall thereupon cease upon the  principal
so credited.

Security.  Holder  shall  have  a security  interest  in  certain
securities  listed  on Scheduled 1 (attached hereto)  until  such
time  as Maker fulfills its obligations under this Note or Holder
purchases  said securities pursuant to its option of Acceleration
(defined below),

Acceleration.   Holder, upon three (3) business  days  notice  to
Maker,  at  its  sole discretion for any reason  whatsoever,  may
purchase  the  Schedule 1 securities, said purchase resulting  in
the  cancellation of the obligation of Maker to pay the principle
and  accumulated interest of this Note. If Maker  had  previously
remitted  to  Holder any portion of the principle or  accumulated
interest  pursuant  to  the Prepayment  clause  above  then  upon
Acceleration Holder shall remit to Maker any such prepayment.  If
prior to expiration of said 3 business days this note is paid  in
full, Holder's Acceleration Option shall terminate.

No  Assignment.   Neither Maker nor Holder shall be  entitled  to
assign,  pledge,  transfer or otherwise convey  the  benefits  or
burdens  of  this Note without the prior written consent  of  the
other, except that any entity acquiring all or substantially  all
of  the assets or stock of Maker shall automatically acquire  the
burdens of this Note and Maker shall thereupon be released of its
obligations hereunder, all without Holder's consent.

DETWILER, MITCHELL & CO.           James H. Graves

a Delaware corporation

By: /s/ Stephen Z. Frank	By: /s/ James H. Graves
   -----------------------          ---------------------

DO  NOT DESTROY THIS ORIGINAL NOTE: When paid, this Note must  be
surrendered to Maker for cancellation and retention.

<PAGE>

                           SCHEDULE 1




Cierra Photonics                        100,000

Ion Optics                              100,000

Protedyne                                50,000

Media Point                              50,000



<PAGE>

</TEXT>
</DOCUMENT>
