WASHINGTON MUTUAL MORTGAGE SECURITIES CORP., as Depositor and WASHINGTON MUTUAL BANK, as Servicer and LASALLE BANK NATIONAL ASSOCIATION, as Trustee and CHRISTIANA BANK & TRUST COMPANY,Pooling and Servicing Agreement • June 9th, 2005 • Washington Mutual Mortgage Pass-Through Certificates, WMALT 2005-4 • Asset-backed securities • Delaware
