I've found five Til???uff baptisms which appear to be in the gap years you mention on FindMyPast using the surname with a wildcard "Til*f". If you don't have access to try this let me know and I can search for you. Here's one of them...
Day:18
Month:August
Year:1811
Forename:Joseph
Othernames:Samuel
Surname:Tilliduff
Fathers forenames:Joseph
Fathers occupation:Clerk
Mothers forenames:Elizabeth Surrey
Birth date:28/07/1811
Address:John Street
Location of church:Stepney
Parish:St George In The East
Church address:Cannon Street Road
Entry No:1808
Source Ref:NX 97/277
Data provider:Docklands Ancestors Ltd
Cheers,