Hi Steve
there's only one Marshall in the book - buried in Tranent:
obelisk by George Johnston from Australia in memory of Helen Donaldson 8.1.1847 (57), brother James drowned under distressing circumstances near the Bass Rock 29.6.1864 (47), father Peter Johnston 29.3.1874 (84). His end was Peace. Jane Marshall 21.10.1890 (64), husband Robert Johnston. Verse.
south side - In mem of my bro John Johnston 13.9.1874 (57). Our father Robert Johnston 29.3.1898 (82)
north side - In mem of Margaret Hay 19.3.1877 (67) 2nd wife of Peter Johnston. Also Peter Johnston 4.9.1899 (25) cut short a life of singular promise in his profession as a stockbroker at Edinburgh and in his helpful service to the people of Cockenzie, father Thomas Johnston, Elcho Place, Cockenzie. Eulogy.
Hope this helps
Jo