Does the "long" describe about the dulation of time or the distance of location?

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Nov 29th 2011 12:36
From a suspense story "THE CHASE" by Sidney Sheldon

Masao is trying to become an employee of a company.

(Quote; You do not need to correct Sheldon's work.)
"Under Experience, Masao gave the names of half a dozen fictitious companies and made up addresses in Chicago, Detroit and Denver. It would take weeks to check out all the information ,and by then he would be long gone. "
(Experience is originally written in italics.)

The "long" disturbs me again.
In the last sentence of the quote, which is the alternative expression of the original meaning?

and by then he would be gone to the long distance.
or
and by then he would be gone a long time ago.
or
Both time and location?

Thank you
Desperate Beagle