unknown WW I uniform

[ocpd71]

I have a uniform, apparently from the WWI era, that I need help identifying. It is a khaki cotton tunic and trousers with a dark blue shield shaped shoulder patch with a light blue capital letter "E". The buttons do not have the American eagle coat of arms but instead what looks like the letters "BCS" intertwined. I will post pictures as soon as I can. Any ideas as to the origin of this uniform?

[peter monahan]

Hard to say without a photo but could be some government service or even a band or the like. A picture would help a lot!

[Ulsterman]

Can we see this uniform?

There were scholars attached to the US army in WW1 whose job was to teach basic reading/writing skills to troops who were illiterate/quasi-illiterate (about 15% of the inductees). These volunteer Professors wore uniforms and had a patch similar to that ("E" being "Education Section").

I have no idea what BCS could be though.