Source: pp 158-159, The Cambridge Companion to Anselm, by Brian Davies, Brian Leftow
What Anselm describes himself as looking for here he believed he had found when reflecting on the idea that God is "something than which nothing greater can be thought" (aliquid quo maius nihil cogitari potest).
The bolded looks wrong. How can something (a pronoun) precede than (a preposition)?
Why was the bold not written as: something OTHER than which?
PS: I reorder the first two sentences in the quote to facilitate understanding:
[Anselm] believed he had found
[w]hat Anselm describes himself as looking for here[,] when reflecting [...]