What is it you are wanting to know about these?
I am sorry these are not things that can be done online. If the items are not marked there is no way to know who made them, when they were made. There is no way to know what mansion they would have belonged in. This is something that would have to be done by a Antique Appraiser Researcher, they would have to spend a lot of time trying to find out this information. This will be costly. Appraisers charge on average 200.00 an hour with a minimum of 200.00 to start. But, if an item is not marked there is no way to find out exact information,without extensive research. Online like this, the most that can be done for the amount of value that was placed on the question, is an estimated value on today's market.