There are not enough seats in Will's house for a family of 3.
Wills house has but one bed.
No one can hang on the climbing surfaces of an æroplane for an extended period of time.
Lance's letter is not addressed to anyone in particular; it is as if it is a record of his internal thoughts.
An NOC carries Will to what it says is the top floor of the Tower of Babel, but Will is nowhere near the top floor when he arrives.