Exhibit 2.1 / Letter to the Wisconsin OCI

                                  April 3, 2006

Mr. Tim Vande Hey
Insurance Financial Examiner - Advanced
Bureau of Financial Analysis and Examinations
125 South Webster Street
Madison, Wisconsin  53707-7873

Re:  Acquisition of Control of Physicians Insurance Company of Wisconsin, Inc.
     by ProAssurance Corporation (Case No. 06-C29893)

Dear Mr. Vande Hey:

Thank you for your letter of March 29, 2006 in regards to the above captioned
matter. The following information is in response to the items in your letter
that were requested in connection with your Office's review of the proposed
acquisition of control of Physicians Insurance Company of Wisconsin Inc.
(hereinafter also, "PIC-WI").

1.   In your response letter dated March 6, 2006, you indicated that current
     plans were to retain PIC-WI's surplus note. Please explain the rationale
     for maintaining the surplus note as the original intent of the surplus note
     related to a capitalization plan that appears no longer relevant to the
     company going forward.

     According to Article XIV, Section 14.01 of the Indenture for the PIC-WI
     surplus notes, (in the absence of an unfavorable "Tax Event," as defined in
     the indenture), the notes cannot be redeemed prior to May 24, 2009. If a
     "Tax Event" occurs, the Company may redeem the notes at a substantial
     financial penalty. Tax Event is defined in the Indenture as follows:

          "Tax Event" means that the Company shall have received an opinion of a
     nationally recognized independent tax counsel experienced in such matters
     to the effect that, as a result of (a) any amendment to, or change
     (including any announced prospective change) in, the laws or any
     regulations thereunder of the United States or any political subdivision or
     taxing authority thereof or therein, or (b) any official administrative
     pronouncement or judicial decision interpreting or applying such laws or
     regulations, which amendment or change is effective or which pronouncement
     or decision is announced on or after the date of the original issuance of
     the Surplus Notes, there is more than an insubstantial risk that, if the
     Company is organized and existing under the laws of the United States or
     any state thereof or the District of Columbia, interest payable by the
     Company on the Surplus Notes is not, or within 90 days of the date of such
     opinion will not be, deductible by the Company, in whole or in part, for
     United States federal income tax purposes."

     Accordingly, we do not foresee redeeming the surplus notes prior to May 24,
     2009. We will evaluate redemption of the notes as that date approaches.




2.   Please provide legal justification as to the transferability of PIC-WI
     outstanding shares of common stock. Your response should include discussion
     related to the original intent of transferability of the outstanding common
     shares of PIC-WI stock and any provisions and/or communication that you are
     aware of that were meant to restrict the transferability of the shares.

     The transferability of the PIC-WI shares is addressed in the attached
     letters from counsel. Jeffrey B. Bartell, Esq., counsel for PIC-WI
     addresses the question in PIC-WI's historical context. Jack P. Stephenson,
     Jr., counsel for ProAssurance addresses the question in the context of the
     exchange of the shares as a part of the proposed transaction.

3.   Nursing homes that are operated as a single entity with a hospital are
     required to participate in the Wisconsin Injured Patients & Families
     Compensation Fund (WI Compensation Fund) and to have their primary coverage
     with a licensed carrier. Currently, the majority of these nursing homes
     have their primary coverage placed with PIC-WI. Does ProAssurance
     Corporation intend to maintain this coverage? Please comment on
     ProAssurance Corporation's evaluation of this block of business and how you
     expect your decision to impact the nursing homes' ability to obtain this
     required coverage.

     ProAssurance intends for PIC-WI to continue to offer the referenced
     coverage in Wisconsin. ProAssurance is familiar with the maintenance of
     long-term care beds by licensed hospitals and insures such risks as a part
     of its hospital book of business.


4.   PIC-WI currently provides coverage to some Wisconsin physicians that render
     medical services on a part-time basis in Illinois. Generally, these
     physicians also have WI Compensation Fund coverage in excess of their
     primary limits. In the proposed post merger "Plan of Operation,"
     underwriting, policy administration, and risk management for the Illinois
     business of PIC-WI will be consolidated into ProAssurance Corporation's
     underwriting office in Okemos, Michigan, and the claims function will be
     consolidated into ProAssurance's Corporation's existing Lisle, Illinois
     office. Please identify which claims office will handle the claim of a
     Wisconsin doctor practicing in Illinois, if a suit is filed in Illinois.
     Will the claim stay with the office/region that issued the policy or will
     it be handled by the office that manages the Illinois claims?

     Wisconsin domiciled risks with incidental cross border exposures will
     continue to be underwritten and serviced by the Madison office of PIC-WI.
     However, should a claim arise in Illinois, that claim would be handled
     through the ProAssurance Illinois claims office located in Lisle, Illinois
     in consultation with the Madison office.

     ProAssurance believes that claims are best handled by the local office that
     is most familiar with that particular jurisdiction. It is customary in the
     ProAssurance system that the local office serving a particular claims venue
     will handle a claim in that venue even if it is underwritten in a different
     location. ProAssurance currently has 13 claims offices and several other
     single person claim operations located in various jurisdictions.




     We also note that, for example, should an Illinois insured of ProNational
     Insurance Company be sued in Wisconsin, that claim would be handled by the
     Madison office.

     All of the ProAssurance insurance companies act cooperatively in this and
     other regards pursuant to the Expense Allocation Agreement and Management
     Services Agreement that are attached to the Form A as Exhibits B and C,
     respectively.

5.   PIC-WI currently has a well regarded risk management program in place for
     its insureds. Please identify whether ProAssurance Corporation will
     maintain this specific program as it currently exists, or whether changes
     are anticipated to the program.

     ProAssurance intends to maintain a strong PIC-WI risk management presence
     in Wisconsin. Both ProAssurance and PIC-WI view risk management as an
     integral part of the service provided to healthcare clients so as to assist
     them to mitigate risks and, in turn, lower liability costs.

     In all of our principal jurisdictions, ProAssurance endeavors to maintain a
     strong risk management presence. ProAssurance's risk management department
     is led by our Medical Director who is an M.D. The risk management staff is
     comprised of 30 staff positions including 17 risk management professionals
     and three risk management vice-presidents, one resident in Okemos,
     Michigan, one resident in Washington, D.C., and one resident in Birmingham,
     Alabama.

     In sum, we intend to maintain PIC-WI's risk management program, but that
     program will change and be strengthened - as will the programs in all of
     our states - as we combine the expertise of ProAssurance and PIC-WI.

                                                     Sincerely,
                                                     /s/ Victor T. Adamo
                                                     Victor T. Adamo

VTA/lm