Hello Andrew, There was (and still is) an Adelphi Place in Portobello. My Mother was born there in 1902 and my Grandmother lived in the same house (No 11) until her death in 1956. The house still stands - at least it did in May of this year! I think that No 1 may also still be there, but not sure. Could possibly be your Adelphi Place. Regards, Ian