Their mother died in 1888 .
The surviving sister , Susan Elizabeth , passed away in 1908 , leaving mother 's estate to be administered mother 's her niece , Amy Isabel Dovaston , mother of painter Margaret Dovaston .
Their mother died in 1888 and the surviving sister , Susan Elizabeth , passed away in 1908 , leaving her estate to be administered by her niece , Amy Isabel Dovaston , mother of painter Margaret Dovaston .