was she involved in humanitarianism?
No.
Margaret Macpherson Grant
Macpherson Grant continued to fund enterprises of the Episcopal Church. She provided the organ for Inverness Cathedral, which was built between 
who is margaret macpherson grant? She was a Scottish heiress and philanthropist. where was she born? Aberlour.
wiki:14630239
Margaret Macpherson Grant [SEP] Philanthropy
Macpherson Grant continued to fund enterprises of the Episcopal Church. She provided the organ for Inverness Cathedral, which was built between 1866 and 1869 by the architect Alexander Ross, and in 1874 she persuaded Canon Charles Jupp to come to Aberlour to act as her personal chaplain with the promise to build an orphanage with a church and school. The orphanage was founded in 1875, under Jupp's administration. It initially operated out of a cottage until new buildings were completed. Alexander Ross was engaged to design the orphanage and its chapel, later known as St Margaret's Church, and work on these started in 1875.