Patricia, I can't find an entry for Edith Blanche Watson's birth in Brian Lawson's birth index. In 1901 there were 7 children living with William Watson and Selina nee Kelly at Braaid Farm. For some strange reason, the birth index only has 2 of these.

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marriage:

WATSON, William 3 Nov 1887 D mar 12 KELLY, Selina Anne

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WATSON, William Charle 19 Apr 1891 Douglas 901 WATSON, William / KELLY, Selina Ann

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WATSON, Florence Elsie 15 Aug 1893 Douglas 1047 WATSON, William / KELLY, Selina Ann

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Ancestry's transcription of the 1901 census (Marown district 1, image 3, Braaid Farm):
1901 Isle of Man Census
about Edeth B Watson
Name: Edeth B Watson
Age in 1901: 8 Months
Estimated birth year: abt 1900
Father's name: William Watson
Mother's name: Celena A Watson
Gender: Female
Where born: Marown, Isle of Man, Isle of Man
Civil Parish: Marown
Ecclesiastical parish: Marown
County/Island: Isle of Man
Country: Isle of Man
Street address: View image
Condition as to marriage: View image
Education: View image
Employment status: View image
Occupation: View image
Registration district: Isle of Man
Sub-registration district: Isle of Man
ED, institution, or vessel: 1
Neighbors: View others on page
Household schedule number: 16

Household Members: Name Age
William Watson 35
Celena A Watson 32
Celena J Watson 11
William C Watson 9
Korance E Watson 7
Jessie M Watson 4
George E Watson 3
Ethel L Watson 2
Edeth B Watson 8 Months
Oscar Kewley 18

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Jean C