Her last name would have been Purdy not Prudy. The Purdy family is a long time one in Angels Camp. There is a Purdy Road and a area of the city is commonly called Purdyville. The second school started in Angels Camp (but the first actual school house built since the first school was held in just a room) was the Purdyville School and it at one time had up to 140 students. The school house was later turned into a private residence and is still there. The 1860 census shows a Edward F. Purdy age 35, single, born in New Jersey.
In 1870 the census shows Edward age 45 with wife Dora age 26 and children Emory age 4, Rose age 2 .
In 1880 the census has Edward born in 1825 with wife Dora born in 1849 in Pennsylvania and children Emory born in 1866 and Rose born in 1868.
In 1900 the census doesn't show the family although there is a Amelia Purdy age 55 with son Emory age 36 living together.
In 1910 there is a Doris F. Purdy age 65 born in Pennsylvania living alone next door to Antone and Giovanna Perino and their son Victor.
The death records for Calaveras County show Edward F. Purdy died 1/29/1899 which is why he wasn't in the 1900 census. Doris F. Purdy died 2/26/1933. Her fathers name was Hickman. When Emory Purdy died 8/21/1865-2/1/1909 his mother's maiden name was given as Doris Hickman so I believe Edwards wife Dora was actually Doris Hickman Purdy and probably their daughter Rose was Victor's mother. The fact Dora/Doris lived next door to the Perino family in 1910 points to a relationship. She was probably the mother in law of Antone Perino and the grandmother of his son Victor and that is why they lived next door.
I will check on the name Purdy at the archives next week and will let you know if I find anything further.