From this site,

Record_ID: 284269
Entry_Number: 264
Year: 1900
Month: May
Day: 27
Parents_Surname: DICKINSON
Child_Forenames: Sydney
Fathers_Forenames: James
Mothers_Forenames: Jane
Mothers_Surname:
Residence: Berry Hill
Occupation: Miner
Officiating_Minister: J W Jacob
Event: Baptism
Memoranda: Born 1900 Apr 29
Notes: This child has a twin Nelly baptised this day.
Register_Reference: D2598/3/5
Page_Number: 33
Parish_Chapel: Lydbrook Primitive Methodist

Record_ID: 543077
Entry_Number: 264
Year: 1900
Month: May
Day: 27
Parents_Surname: DICKINSON
Child_Forenames: Sydney
Fathers_Forenames: James
Mothers_Forenames: Jane
Mothers_Surname:
Residence: Berry Hill
Occupation: Miner
Officiating_Minister: J W Jacob
Event: Baptism
Memoranda: Born 1900 Apr 29
Notes: This child has a twin, Nelly, baptised this day.
Register_Reference: D2598/3/5
Page_Number: 33
Parish_Chapel: West Dean Methodist

GR 1911 Census, Whitecliff

In the household of George Henry TAYLOR,

Sydney DICKENSON, Boarder, 10, born Berry Hill, Glos.