Antique Wood Table Darker on One End?

I have an antique hall table, about 150 years old. It has some inlaid wood, some hand carving, possibly some machine turning in the legs. I am guessing it's middle class Victorian. Overall, it's in pretty good shape.

However, we moved it to a new location in the living room and now I'm noticing that the end that was previously nearest to the door is substantially darker where the inlaid wood occurs.

Any cleaning suggestions? I have no idea what it's made out of except to say that the piece is of very heavy, dark wood with lighter inlaid pieces.

Thanks,
Holly from Richardson, TX