Misc: How many bones are there in the inner ear?

Questions

In 1984 USSR announces it will not participate in ---------- Summer Olympics.?

In 1988 Robert A ---------- sci-fi writer, dies of heart failure at 80.?

In 1502 Columbus left ---------- on his 4th and final trip to the New World. ?

In 1860 James M. ---------- (in Scotland), Author (Peter Pan) ?

In 1873 Howard---------- , Egyptologist who found King Tutankhamen ?