Mary Slinger was the daughter of Richard Slinger and Ellen Taylor.

Mary was born around 1851 in Clitheroe, Lancashire.

Mary married Jonathan Calvert in 1876 in Clitheroe Registration District.

She had the following children from her marriage to Jonathan Calvert:

- Richard Slinger	born in 1873 in Clitheroe, Lancashire.
- Ellen Calvert	born around 1876 in Clitheroe, Lancashire.
- Robert Calvert	born in 1878 in Clitheroe, Lancashire.
- Ann Calvert	born around 1879 in Clitheroe, Lancashire.
- David Calvert	born around 1881 in Clitheroe, Lancashire.
- Elizabeth Alice Calvert	born in 1884 in Clitheroe, Lancashire.
- Margaret Calvert	born in 1885 in Clitheroe, Lancashire.
- Sarah Calvert	born around 1888 in Clitheroe, Lancashire.
- May Calvert	born in 1891 in Clitheroe, Lancashire.

The places where she lived have been identified as:

From	To	Place	Source of Information
1861		Waterloo, Clitheroe, Lancashire.	Census Data.
1871		34 Waterloo, Clitheroe, Lancashire.	Census Data.
1881		21 Wilkin Street, Clitheroe, Lancashire.	Census Data.
1891		35 Broomlow Street, Clitheroe, Lancashire.	Census Data.
1901		24 Little Moor Road, Clitheroe, Lancashire.	Census Data.
1911		61 Corporation Street, Chorley, Lancashire.	Census Data.

Mary was a Cotton Rover.

Details of Mary's death are not known.

Census Data:

Year	Address
1861	Waterloo, Clitheroe, Lancashire.
1871	34 Waterloo, Clitheroe, Lancashire.
1881	21 Wilkin Street, Clitheroe, Lancashire.
1891	35 Broomlow Street, Clitheroe, Lancashire.
1901	24 Little Moor Road, Clitheroe, Lancashire.
1911	61 Corporation Street, Chorley, Lancashire.