Thomas J. O'Brien, of Stewart Manor, died on Oct. 22, 2000. He was a retired national import specialist for the US Customs Service and a member of the Stewart Manor Fire Dept. Husband of Marie. Father of Betty Seibold, Thomas, Arthur and James O'Brien. Grandfather of 11. Great-grandfather of four. Brother of Joseph O'Brien. Arrangements were made by the Cassidy Funeral Home, Mineola. Funeral Mass at St. Anne's RC Church. Interment Calverton National Cemetery. Contributions can be made to St. Anne's Church Outreach Program. Dr. Gilbert N. Sandler, of Garden City, died on Oct. 24, 2000. Husband of Jacqueline. Son of the late Dr. and Mrs. Nathaniel Sandler. Arrangements were made by the Fairchild Chapel. Interment Locust Valley Cemetery. Contributions can be made to Memorial Sloan Kettering, Mercy Hospice of Esterhville Animal Shelter, Greenfield Center, NY 12833. Martin R. Mortenson, formerly of Garden City, died on Oct. 25, 2000. He was a emmber of Steamfitters Union Local 638. Husband of Anne and the late June. Father of Bradley, Scott, John, Tracy Murray and Kate. Grandfather of 13. Brother of George, Joyce Clements, Laura Bry, Nicholas and CarolKane. Arrangements were made by the Fairchild Chapel, Garden City. Mass of Christian Burial at St. Joseph's RC Church. Interment Locust Valley Cemetery.