The parish register image, thanks Ancestry but no thanks for your indexing, transcript by me:

>                  Camden  >  St Michael, Highgate  >  18351862

“                         Page 78
“BAPTISMS solemnized in the Parish of Saint Michael Highgate
“  in the County of Middlesex in the Year 1838
”. . . .
“When Baptised:       Octr. 10th [ 1838 ]
“No:                  624
“Child’s Forename:    Mary Eleanor, Dr. of
“Parents’ Forenames:  James &* Mary
“Parents’ Surname:    Drummond
“Abode:               Down, Kent
“Profession:          Clergyman
“Celebrant:           J.Drummond
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Ancestry reports that she was baptised in Downe, Kent:

Name:           Mary Eleanor Drummond
Gender:         Female
Record Type:    Christening (Baptism)
Baptism Date:   27 Aug 1838
Baptism Place:  Down, Kent, England
Father:         James Drummond
Mother:         Mary Drummond

and Cliff Webb via FindMyPast reports that she was baptised at Highgate:

First name(s)           Mary Eleanor
Last name               Drummond
Baptism year            1838
Baptism date            10 Oct 1838
Place                   Highgate, St Michael
Residence               Downe, Kent
Relationship            Daughter
Father's first name(s)  James
Mother's first name(s)  Mary
Occupation              Clergyman
County                  Middlesex
Country                 England
Record set              Middlesex Baptisms

I happen to believe Cliff Webb and he was right!  See above.
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