Yes, you might be right - the National Archives gives two references:
Reference: PROB 11/157/634
Description: Sentence of John Parvis of North Fawley, Berkshire
Date: 09 June 1630
Held by: The National Archives, Kew
Matches up to the entry on Ancestry:
England & Wales, Prerogative Court of Canterbury Wills, 1384-1858
Name: Johannis Parvis
[John Parvis]
Residence: North Fawley
Probate Date: 9 Jun 1630
Death Year: Abt 1630
Source Citation
The National Archives; Kew, Surrey, England; Records of the Prerogative Court of Canterbury, Series PROB 11; Class: PROB 11; Piece: 157
Source Information
Ancestry.com. England & Wales, Prerogative Court of Canterbury Wills, 1384-1858 [database on-line]. Provo, UT, USA: Ancestry.com Operations, Inc., 2013.
Original data:
Prerogative Court of Canterbury: Wills of Selected Famous Persons. Digitized images. Records of the Prerogative Court of Canterbury, Series PROB 1. The National Archives, Kew, England.
Prerogative Court of Canterbury and Related Probate Jurisdictions: Will Registers. Digitized images. Records of the Prerogative Court of Canterbury, Series PROB 11. The National Archives, Kew, England.
Reference: PROB 11/156/63
Description: Will of John Parvis, Gentleman of North Fawley, Berkshire
Date: 22 June 1629
Held by: The National Archives, Kew
Looks like Ancestry doesn't have the 156 piece referred to above so don't have the copy of that will only the sentence - good thing I double checked on the National Archives - will download the proper will document from there this afternoon and have a read!