In the search field type Willoughby baptism 1729 and when you get a result click on images and go from there. If this comes up blank try going a year either side, 2 years either side, etc.
If this fails type in Willoughby Par 1, click on the Registers link of the parish you are interested in, go to the bottom of the page and click on 'Browse the 2 records at the level below this one', this will then give you a list of the registers available. Select the one you want and go through page by page or type in a page number if you want to jump a bit.
Not every page has an indexed date agaoinst it.
rgds
Edward