I think we can agree that attempt by warmers to explain away pre-1950 warming are big failures.
But the idea that solar changes stopped after 1050 are absurd.
In the UK bright sunshine rose 8% at the same time as the CO2 warming supposedly occurred. And yet it is ignored.
http://i40.tinypic.com/xgfyok.jpg
As for volcanoes … how does that theory work again?
Katmai in 1912 ejected more material than Pinatubo. Yet the post 1910 warming really took off. There were a lot of VEI4 , 5 and 6 eruptions during 1910 to 1940.
http://en.wikipedia.org/wiki/List_of_large_volcanic_eruptions_of_the_20th_Century