How can I find out if someone retweeted something I retweeted because they saw it via me?


How can I find out if someone retweeted something I retweeted because they saw it via me?

There are plenty of data visualization applications to see the spread of information on Twitter over time.  I simply monitor Topsy [1] to see who says what, and when, about any given URL.

[1] http://topsy.com/www.quora.com/