Agreed there Gerald, the search and rescue missions, especially the McClintock expedition in 1859 served greatly to expand the knowledge of the Arctic. It is sad to note that if the expedition members had emulated the lifestyle and diet of the Inuit, they likely would have survived.  However, it is amazing that after 170 years, that both the Erebus and Terror have been found, and from what I gather, relatively intact.
An interesting footnote: The HMS Terror was a "bomb ship" that participated in the bombardment of Ft. McHenry, the inspiration for Francis Scott Key's "Star Spangled Banner".