X0202 4 2007-04-27 0 0000216851 PETROLEUM & RESOURCES CORP PEO 0001353074 Prue Nancy J F PETROLEUM & RESOURCES CORPORATION 7 SAINT PAUL STREET BALTIMORE MD 21202 0 1 0 0 Vice President Common Stock 2007-04-27 4 F 0 86 36.6 D 15949 I Direct and Indirect Of these shares, 4,230 shares are held directly, 10,980 shares are held indirectly through the Issuer's Thrift Plan Trust (as of 12/31/2006, the most recent date such information is available), and 739 shares are held indirectly through the Adams Express Company Thrift Plan Trust (as of 12/31/2006, the most recent date such information is available). Nancy J. F. Prue 2007-05-01