Keeping the old threads going!

I recently posted on the Saltley College pages, having reread some of my grandad's papers & discovered his school was Saltley College school & that the building still exists.
He then left school in 1894 aged 14 & went to work at an "old Axletree & Cast Ironworks".
I don't know which exact company this was but the word Axletree seems very specific. Although axle making was common, I haven't found any companies using Axletree in their names. The only one I found was the large "Patent Shaft & Axletree co" in Wednesbury. I wonder if it could have been where he worked?
I read that at some point they used the Siemens type of blast furnace & that the slag was sold to Germany, mainly for agricultural purposes (I have NO idea what use it could have been!)
Anyway that all interested me even more, since my Grandfather (who I never met) claimed to have been good at languages at school & not only that, travelled to Germany sometime post 1900, possibly as some kind of merchant /salesman. No-one in the family now knows who he worked for at the time, or what his work there was, hence my interest in the possible foundry connection.
Anyway, that was where he met my grandmother. She had been born in the late 1800's near Poznan, now Poland but at that time it was called Posen, or Kreis Posen, part of the new German state & formerly part of the old Prussian empire. They married in 1910 & subsequently lived in Britain. He seems to have remained in the metals trade.
No doubt there were other foundries (& other businesses) with German connections