Harriet Massingberd was the only daughter and heiress of Charles Burrell Massingberd. She married Charles Godfrey Mundy in 1806 and inherited the relevant Massingberd estate after her father's death in 1835.

The cited manor history identifies her as heiress but does not provide a precise date for the transfer beyond 1835.

Research sources:
- W. O. Massingberd, Court Rolls of the Manor of Ingoldmells in the County of Lincoln, 1902, Introduction, p. xiv. — https://en.wikisource.org/wiki/Court_Rolls_of_the_Manor_of_Ingoldmells_in_the_County_of_Lincoln/Introduction