This is only my thoughts, maybe because in 1891 they all lived at glencrutchery cottage, and in 1901 isabella and katie lived still there, as its right by douglas cem, then maybe they are in there, the only way you could find out is by going and asking like i do if i need to find a grave for some one, it takes time, but in the end worth it you, as sometimes i find when i do this for people the buriel is not mentioned but in the book at the churches it is,,,