This is taken from the web-site of the Oriental Institute, which has a wonderful collection.
Evedently, Meresamun cause of death, place of death and the location of her tomb is unknown.
The mummy and coffin of Meresamun are excellent examples of the skill of the ancient embalmer and coffin maker of Dynasty 22, about the year 950 B.C. The mummy and coffin were purchased in Egypt by James Henry Breasted, the founder of the Oriental Institute, in 1920. Where Meresamun lived and died is unknown, although the style of the coffin suggests that she was originally from the Theban (modern Luxor) area.

Meresamun's form-fitting sheath-like coffin is made of cartonnage, a type of papiér-mâché, composed of layers of fabric, glue and plaster. It is 63 inches (1.6m) long. Cartonnage coffins were formed over a temporary inner core made of mud and straw. After the coffin shell was completed, the wrapped mummy was inserted into the case through the back, and the back seam was then laced up. The separate footboard was laced on, the entire case covered with another layer of thin white plaster and then painted. The colored areas of the coffin were painted with a final layer of protective varnish which has turned slightly yellow with age.

This type of mummy case was normally part of a more complex set of coffins. It would probably have been placed within a wooden anthropoid (human-shaped) coffin, or even in a series of two or three nested coffins, all of which would have been painted with religious scenes