Metaphor is in the lines -
"when all at once I saw a crowd a host of golden daffodils. "
here an indirect comparison is made between the daffodils and people
it's also a personification
Question 1:
Humorous passage 1: "It (the umbrella) was made to be carried on the arm like an enormous ornamental bat and to allow one the opportunity to put on British airs as the atmospheric conditions demanded."
Humorous passage 2: "(The umbrella is) An item to be carried in the street, to be used to startle friends and—in the worst of cases—to fend off one’s creditors."
Question 2:
Passage 1 is funny because it compares the umbrella to an ornamental bat, which sounds weird in the first place. Plus, the umbrellas is said to be used by people who want to seem British, which is even more outrageously funny.
Passage 2 is funny because it treats the umbrella as a scary object which can be used even to fend off people you owe money to, which is absurd.
In both passages, the author uses tone and voice in a very witty way: he speaks seriously about absurdity, about unimaginable stuff. It is like an encyclopedia of weird and fun facts. That is what makes it funny: the contrast between a serious tone and larger than life images.
The Hindenburg disaster at Lakehurst, New Jersey on May 6, 1937 brought an end to the age of the rigid airship.
The disaster killed 35 persons on the airship, and one member of the ground crew, but miraculously 62 of the 97 passengers and crew survived.
After more than 30 years of passenger travel on commercial zeppelins — in which tens of thousands of passengers flew over a million miles, on more than 2,000 flights, without a single injury — the era of the passenger airship came to an end in a few fiery minutes.
Elusive, to be missing or hard to find