Brenda, I believe that you are very likely correct. I'm appraising a piece that has the same marks and I had already come to the conclusion that they are the makers, in part because the dates on my piece are known (right down to the day and month). I also have a reference with that exact mark listed.
Rating
ES Mark on Pendant by: Anonymous
Hi Brenda
as it's marked 14 K (K is the common gold standard designation in the US) I'm leaning towards a US maker.
EHRLICH & SINNOCK were manufacturing Jewelers in Newark, NJ, US in ca 1898 - 1930s
Some references I've looked up have an ampersand between the letters and other references do not.
I agree, however keep in mind that hallmarking only became a legal requirement in 1906 (US) so I would lean towards a post 1906 (as it's marked 14K) date which also fits the historical framework, the Victorian era ended with the passing away of Queen Victoria in 1901 when the Edwardian era although brief - commenced.