Biography provided by the Metropolitan Museum of Art)
 
Few were born into the aristocracy of photography, as was Thereza Llewelyn, but fewer still were equipped to take real advantage of that privileged state. When she was about seven or eight Thereza sat for a lengthy daguerreotype exposure for her father, John Dillwyn Llewelyn. It was not the first time she had assisted in his amateur scientific endeavors. At the family estate of Penllergare, everyone - family, friends, and visitors - was making photogenic drawings and calotypes in the 1840s, and the scientifically minded young lady joined in with enthusiasm. By the time of her marriage to Mervyn Herbert Nevil Story Maskelyne (later Story-Maskelyne), the center of interest for photographers had moved to the wet-collodion plate, a process in which Thereza Story-Maskelyne excelled as an amateur - mostly for her own enjoyment and never for exhibition.