The intermediate galaxy does the lensing. Something has to do it.
Why would you call it something different just because the source
of the light is also the mass that does the lensing?

Look up 'Shapiro delay' for possible info. I just scanned quickly
through the Wikipedia article
http://en.wikipedia.org/wiki/Time_delay_of_light and don't see any
reference to gravitational lensing by that name, but see the quote
of Einstein in the article.

-- Jeff, in Minneapolis

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