I suspect this is the Mary Ann BALDWIN refered to :-

1881 24 Drybrook Road
Joseph Roberts 26
Mary Ann Roberts 22
George R. Roberts 3
Sidney J. Roberts 1

Name: Mary Anne Baldwin
Name: Joseph Roberts
Year of Registration: 1877
Quarter of Registration: Apr-May-Jun
District: Westbury On Severn
County: Gloucestershire
Volume: 6a
Page: 417

1871 Pludds
Aaron Baldwin 38
Elizabeth Baldwin 37
Aaron Baldwin 6
Albert Baldwin 10
Edith Baldwin 1
Elizabeth Baldwin 13
Mary Ann Baldwin 14

1861 Lydbrook Hill
Aaron Baldwin 28
Elizabeth Baldwin 27
Elizabeth Baldwin 3
Marit Baldwin 1
Mary Ann Baldwin 5
Wm Baldwin 6