CUSIP No. 405805 10 2		13D		Page 4 of 7 Pages

Explanatory Note: Information set forth in this Explanatory Note and under each of the Items referenced below amends, supplements or supersedes, as the case may be, the information set forth in the Schedule 13D, as amended by Amendment No. 9, filed by the Estate of Arch C. Scurlock (the “Estate”) and Nancy M. Scurlock (“Mrs. Scurlock”) with the Securities and Exchange Commission (“SEC”) on March 17, 2005. Amendment No. 9 was filed to (i) include Mrs. Scurlock, as Executrix of the Estate, as a joint filer with the Estate (collectively, the Estate and Mrs. Scurlock are hereinafter referred to as the “Reporting Person”) pursuant to Rule 13d-5(a) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), (ii) correct the number of shares of Halifax Corporation (“Halifax”) common stock, par value $0.24 per share (“Halifax Common Stock”) beneficially owned by the Reporting Person, and (iii) report that the Reporting Person is no longer subject to the reporting requirements of Section 13(d) of the Exchange Act with respect to Halifax. This Amendment No. 10 is filed for two reasons:

(1) To correct the number of shares of Halifax Common Stock beneficially owned by the Reporting Person. Amendment No. 9 inadvertently failed to include 13,167 shares of Halifax Common Stock underlying currently exercisable options and 129,698 shares of Halifax Common Stock underlying a convertible subordinated debenture plus interest thereon (the “Debenture”), which was exercisable as of October 18, 2004, at $3.19 a share. Therefore, Amendment No. 9 incorrectly stated that the Reporting Person was the beneficial owner of 785,922 shares of Halifax Common Stock. Instead, Amendment No. 9 should have stated that the Reporting Person was the beneficial owner of 928,787 shares of Halifax Common Stock.
(2) To clarify that as of to the First Transfer Event (hereinafter defined), the Reporting Person was no longer subject to the reporting requirements of Section 13(d) of the Exchange Act, but remained the beneficial owner of 13,167 shares of Halifax Common Stock underlying exercisable options until the Second Transfer Event (hereinafter defined). Immediately thereafter, subsequent to certain transfers pursuant to the terms of the Will of Arch C. Scurlock (“Mr. Scurlock”), the Arch C. Scurlock Trust (the “ACS Trust”) and the Nancy M. Scurlock Trust (the “NMS Trust”), Mrs. Scurlock once again became subject to the reporting requirements of Section 13(d) of the Exchange Act. Upon the Second Transfer Event, the Estate no longer held any shares of Halifax Common Stock, and no longer had any voting or dispositive interests in any shares of Halifax Common Stock.

Item 3. Source and Amount of Funds or Other Consideration.

          Upon the Second Transfer Event, the Estate no longer held any shares of Halifax Common Stock, and no longer had any voting or dispositive interests in any shares of Halifax Common Stock. Since the Second Transfer Event and the Second Election (hereinafter defined), Mrs. Scurlock has directly beneficially owned 399,544.5⁵ shares of Halifax Common Stock.

Item 4. Purpose of Transaction.

          The Estate was established for the purpose of distributing the assets of Mr. Scurlock pursuant to the terms of his Will. In accordance therewith, on October 18, 2004, the Reporting Person disposed of 785,922

CUSIP No. 405805 10 2		13D		Page 5 of 7 Pages

shares of Halifax Common Stock and 129,698 shares of Halifax Common Stock underlying the Debenture by transferring such shares and the Debenture (the “First Transfer Event”) to the ACS Trust. Immediately thereafter, on the date even with the First Transfer Event, the ACS Trust transferred one-half of such shares and the Debenture to the NMS Trust and the remaining one-half to the Arch C. Scurlock Children’s Trust (the “Children’s Trust”). On such date, pursuant to the terms of the NMS Trust, Mrs. Scurlock elected to withdraw 392,961 shares of Halifax Common Stock and 64,849 shares of Halifax Common Stock underlying the Debenture from the NMS Trust (the “First Election”).

          In accordance with the terms of Mr. Scurlock’s Will, on October 3, 2005, the Reporting Person disposed of 13,167 shares of Halifax Common Stock underlying currently exercisable options by transferring such options (the “Second Transfer Event”) to the ACS Trust. Immediately thereafter, on the date even with the Second Transfer Event, the ACS Trust transferred one-half of such shares to the NMS Trust and the remaining one-half to the Children’s Trust. On such date, pursuant to the terms of the NMS Trust, Mrs. Scurlock elected to withdraw 6,538.5 shares of Halifax Common Stock underlying currently exercisable options held by the NMS Trust (the “Second Election”).

Item 5. Interest in Securities of the Issuer.

          (a)     As of the First Transfer Event, the Reporting Person beneficially owned 13,167 shares of Halifax Common Stock underlying currently exercisable options, which shares equal less than 1% of the Halifax Common Stock. The Estate ceased to be the beneficial owner of any shares of Halifax Common Stock upon the Second Transfer Event. Since the Second Election, Mrs. Scurlock has directly beneficially owned 399,544.5 shares of Halifax Common Stock, an amount equal to 12.6% of the Halifax Common Stock. For purposes of this Item, the percent of class is based on 3,172,206 shares of Halifax Common Stock outstanding as of August 10, 2005, as indicated in the Halifax Corporation Form 10-Q for the quarterly period ended on June 30, 2005, and for the Reporting Person includes 13,167 shares of Halifax Common Stock underlying currently exercisable options and for Mrs. Scurlock includes 6,583.5 shares of Halifax Common Stock underlying currently exercisable options.

          (b)     As of the First Transfer Event, the Reporting Person had sole power to vote or to direct the vote and to dispose or to direct the disposition of 13,167 shares of Halifax Common Stock underlying currently exercisable options. Upon the Second Transfer Event, the Estate ceased to have any power to vote or to direct the vote and to dispose or to direct the disposition of any shares of Halifax Common Stock. Since the Second Election, Mrs. Scurlock has had sole power to vote or to direct the vote and to dispose or to direct the disposition of 399,544.5 shares of Halifax Common Stock.

          (c)     In accordance with the terms of Mr. Scurlock’s Will, on October 3, 2005, the Reporting Person disposed of 13,167 shares of Halifax Common Stock underlying currently exercisable options by transferring such options to the ACS Trust. Upon the Second Election, Mrs. Scurlock acquired 6,583.5 shares of Halifax Common Stock underlying currently exercisable options from the NMS Trust.

          (d)     The beneficiaries of the Estate may have had the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, securities pursuant, and subject, to the terms of Mr.

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Scurlock’s Will while the Estate held such securities. Any such right terminated when the securities were transferred from the Estate to the ACS Trust. The beneficiaries of the Children’s Trust have the right to receive and the power to direct the receipt of dividends from, or the proceeds from the sale of, the Halifax securities held by the Children’s Trust.

          (e)     The Reporting Person ceased to be the beneficial owner of more than five percent of the Halifax Common Stock upon the First Transfer Event.

Item 7. Material to be Filed as Exhibits.

          Exhibit A — Agreement between the Estate and Mrs. Scurlock regarding the filing of a joint statement as required by Rule 13d-1(k)(1).

CUSIP No. 405805 10 2		13D		Page 7 of 7 Pages

SIGNATURE

          After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete, and correct.

Schedule 13D
Exhibit A

The Estate of Arch C. Scurlock
10575 NW Skyline Boulevard
Portland, Oregon 97231

Mrs. Nancy M. Scurlock
10575 NW Skyline Boulevard
Portland, Oregon 97231

          Arch C. Scurlock passed away on December 9, 2002, and all of his assets were transferred to the Estate of Arch C. Scurlock (the “Estate”), with Nancy M. Scurlock (“Mrs. Scurlock”) as Executrix. The Estate and Mrs. Scurlock have agreed to file their Schedules 13D with respect to their interests in Halifax Corporation jointly in accordance with Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended. The purpose of this instrument is to acknowledge the agreement of the undersigned parties that the Schedule 13D (Amendment No. 10), to which this instrument is appended as Exhibit A, is filed on behalf of each of them.