Form 144

SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

FORM 144

NOTICE OF PROPOSED SALE OF SECURITIES
PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933

ATTENTION: Transmit for filing 3 copies of this form concurrently with either placing an order with a broker to execute sale or executing a sale directly with a market maker.

1(a) NAME OF ISSUER (Please type or print) (b) IRS IDENT. NO. (c) SEC FILE NO.
Metalline Mining Co   91-1766677    0-27667        


1(d) ADDRESS OF ISSUER STREET CITY STATE ZIP CODE (e) TELEPHONE NUMBER
(with area code)
1330 E. Margaret Ave.     Coeur D Alene ID   83815   208-665-2002    


2(a) NAME OF PERSON FOR WHOSE
      ACCOUNT THE SECURITIES ARE
      TO BE SOLD
(b) IRS IDENT. NO.       (c) RELATIONSHIP TO ISSUER (d) ADDRESS STREET CITY STATE ZIP CODE
Passport Materials Master Fund, LP 98-0484269   N/A c/o Passport Management, LLC
30 Hotaling Place, Ste 300
San Francisco CA   94111  
             


INSTRUCTION: The person filing this notice should contact the issuer to obtain the IRS Identification Number and the SEC File Number.



      3(a)      (b) SEC USE ONLY
(c) (d) (e)        (f) (g)
Title Of The
Class Of
Securities
To Be Sold
Name and Address Of Each Broker Through
Whom The Securities Are to Be Offered Or
Each Market Maker Who Is Acquiring
The Securities
Broker-Dealer
File Number
Number Of
Shares Or Other
Units to be Sold
(See Instr. 3(c))
Aggregate
Market Value
(See Instr. 3(d))
Number of Shares
Or Other Units
Outstanding
(See Instr. 3(e))
Approximate
Date of Sale
(See Instr. 3(f))
(Mo. Day Yr.)
Name of Each
Securities
Exchange
(See Instr. 3(g))
 
     Common        UBS
     677 Washington Blvd
     Stamford, CT 06901
      360,000   1,396,800   36,819,483   May 23, 2007   AMEX  
                                   
                                   


  INSTRUCTIONS:
1.




2.
(a)
(b)
(c)
(d)
(e)
(a)
(b)
(c)

(d)
Name of Issuer.
Issuer’s IRS Identification Number.
Issuer’s SEC file number, if any.
Issuer’s address, including zip code.
Issuer’s telephone number, including area code.
Name of person for whose account the securities are to be sold.
Such person’s IRS identification number, if such person is an entity.
Such person’s relationship to the issuer, (e.g., officer, director, 10% stockholder,
or member of immediate family of any of the foregoing.
Such person’s address, including zip code.
  3.
(a)
(b)

(c)

(d)

(e)


(f)
(g)
Title of the class of securities to be sold.
Name and address of each broker through whom the securities are
intended to be sold.
Number of shares or other units to be sold (if dept securities, give the
aggregate face amount.
Aggregate Market value of the securities to be sold as of a specified
date within 10 days prior to the filing of this notice.
Number of shares or other units of the class outstanding, or if debt
securities the face amount thereof outstanding, as shown by the most recent
report or statement published bye the issuer.
Approximate date on which the securities are to be sold.
Name of each securities exchange, if any, on which the securities are intended to be sold.


TABLE I – SECURITIES TO BE SOLD

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefore:


Title Of
The Class

Date You
Acquired

Nature Of Acquisition Transaction
Name of Person From
Whom Acquired (If
Gift, Also Give Date
Donor Acquired)

Amount Of
Securities Acquired

Date Of
Payment

Nature Of Payment
  Common March 1, 2006 Purchased from another account
managed by the same investment
manager. The prior account
purchased the shares on
February 16, 2006 through a
private placement directly from
the company.
Passport Master
Fund, LP
375,000 March 1, 2006 Funds wire
transferred from
custodial account of
buyer to seller.


INSTRUCTIONS: 1.    If the securities were purchased and full payment therefor was not made in cash at the   2.    If within two years after the acquisition of the    
  time of purchase, explain in the table or in a note thereto the nature of the consideration     securities the person for whose account they  
  given. If the consideration consisted of any note or other obligation, or if payment was     are to be sold had any short positions, put or  
  made in installments describe the arrangement and state when the note or other     other option to dispose of securities referred  
  obligation was discharged in full or the last installment paid.     to in paragraph (d) (3) of Rule 144, furnish  
          full information with respect thereto.  


TABLE II – SECURITIES SOLD DURING THE PAST THREE MONTHS

Furnish the following information as to all securities of the issuer sold during the past three months by the person for whose account the securities are to be sold.


Name and Address of Seller
Title of Securities Sold
Date of Sale
Amount Of
Securities Sold

   Gross Proceeds
         


REMARKS:
INSTRUCTIONS: ATTENTION:
See the definition of “person” in paragraph (a) of Rule 144. Information
is to be given not only as to the person for whose account the securities
are to be sold but also as to all other persons included in that definition.
In addition, information shall be given as to sales by all persons whose
sales are required by paragraph (e) of Rule 144 to be aggregated with
sales for the account of the person filing this notice.
The person for whose account the securities to which this notice relates are to be sold
hereby represents by signing this notice that he does not know any material adverse
information in regard to the current and prospective operations of the Issuer of the
securities to be sold which has not been publicly disclosed.

May 30, 2007
(Date of Notice)
PASSPORT MATERIALS MASTER FUND, LP
By: PASSPORT HOLDINGS, LLC
As General Partner

By: Passport CAPITAL, LLC
As Managing Member

By: /S/ John H. Burbank III
Managing Member

The notice shall be signed by the person for whose account the securities are to be sold. At least one copy of the notice shall be manually signed. Any copies not manually signed shall bear typed or printed signatures.
ATTENTION: International misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)