I believe that your relative, Richard James Nettleton, might be the older brother of my grandmother, Laura Nettleton, b. 1879. I have a Richard Nettleton, b. 1871, listed as her brother. I am looking for information about their father Richard George Nettleton (b. 1846, d. 1886). Please let me know if our families are related. I will be in Gibraltar soon and may be able to locate some info about Richard James.
the 3sistersearch family tree has some information on "our" Nettletons.