These I think are perfect for the candle holders. I would have them on Treves' desk and in Merricks room. I feel these suit the time period and since they wouldn't have electricity they would have candle holders.
25 Beautiful DIY Mercury Glass Paint Ideas
Wow, this is beautiful!
This same effect can be done with some old lamps, remove the wiring and paint. These are Mercury glass candle holders
"French Antique Painted Armoire Louis Ⅹ Ⅴ" ancient and modern times, gently Coconfouato [antique lighting and antique furniture] antique United Kingdom, France, antique French antique, antique chandeliers, antique furniture, antique lighting, antique, antique jewelry, interior
♔ Let's Decorate, Mercury glass and cloches. Note...the bottoms could be candlestick holders.