An Emma Bottomley marries in Q2 1871 - possible spouse is John Wood. There's an Emma Wood the right age, with husband John in a Court off Nutter St on 1881, with children Mary J and Martha (both born New York!).
john and Emma Wood of No1 court, Nutter St, baptise a daughter Annie in Jan 1881. There's also a death of an infant Annie on FreeBMD in the same quarter. Might be the other occupant of the grave?