Maison21 commented on the piece about Homewood House and asked about the rugs in photographs four and five. He was wondering if they were authentic to the house. The short answer is yes. What he's asking about is the canvas floorcloths, which were used in houses in the US and Britain in the early 1800's onward.
Since it was easier to make one of these cloths from the ample sailcloth and canvas that was available, especially in a port city like Baltimore, people used them instead of needlepoint or woven wool or cotton rugs. These floorcoverings were known as oylcloths in the UK and floorcloths in the US.
It's actually pretty simple to make a floor cloth. All you need is heavy canvas, paint, and a varnish. The diamond pattern floor cloths in Homewood would have been faux painted like the marble pattern on the front entrance to the house. They were essentially a forerunner of linoleum floors. When the pattern started wearing out, they could be repainted with the same pattern or a new one.
Floorcloths have enjoyed a renaissance in the past decade or two and there are some incredible artists, including Sophie Sarin, whose work I found while researching this story.
Remember, all that's old is new again.