I need some advice regarding my dining room floor. It is composed of blocks laid in a herringbone pattern. The blocks seem to be of a fairly light-coloured wood although it is very hard and dense and resistant to sanding (I tried sanding it using a floor sander but it didn't make much impression; I even thought it might be ceramic, it was that hard! Further probing at the edge of the floor using a penknife indicates that the floor is wood). Having attacked it with the sander I foolishly thought I could simply give it a coat or three of Wickes floor varnish; it looked ok for a while but the varnish didn't take and now it looks awful. Although it is a bit uneven I would like to keep it if only to save me the cost of covering it in laminate. The house is just over 100 years old, but I don't know how old the floor is.
Many thanks in anticipation,