┌─William Clarkson
Eliza Letitia Steptoe Clarkson
│ ┌─John Pickett ⇒
│ ┌─William Pickett
│ │ └─Mary Mess
│ ┌─Martin Pickett
│ │ └─Elizabeth Cooke
└─Mildred Pickett
│ ┌─Joseph Blackwell
└─Lucy Anna Blackwell
└─Elizabeth Lucy Steptoe