Apologies, E. Yorkshire is and was a County but there are now four parts of Yorkshire when there used only to be three. The use of the word "county" these days is not the way most folk use it and there is a difference between Local Government boundaries, traditional counties and ceremonial counties.
Thank you The corby loon, I also thought there were only East, West and North Yorkshire.
Now then, is Hull also a county?
I noted on some correspondence to my sister, the heading on the letter was -- "The City and County of Kingston upon Hull"