Raymond Harrison, 69, abused the girls when they were aged under 13 between 1979 and 1982, Carlisle Crown Court heard.
He denied 12 charges, including four rapes, but was found guilty by a jury.
More from Carlisle Crown Court
View all Carlisle Crown Court coverage
- Ex-Army Vet Jailed for Raking in £36k in Fake Disability Benefits
- Couple Sentenced for Supplying Cocaine and Cannabis in Workington
- Carlisle Woman Charged with Attempted Murder of Man and Child
- Cutting Edge AI Technology Helps Capture Registered Sex Offender Viewing Indecent Images of Children
- The family of a 19-year-old who died following a collision in which she was a rear seat passenger are supporting a police message to driv
- The family of a 19-year-old who died following a collision in which she was a rear seat passenger are supporting a police message to drive to the conditions of the road
More from Carlisle Crown Court
View all Carlisle Crown Court coverage
- Ex-Army Vet Jailed for Raking in £36k in Fake Disability Benefits
- Couple Sentenced for Supplying Cocaine and Cannabis in Workington
- Carlisle Woman Charged with Attempted Murder of Man and Child
- Cutting Edge AI Technology Helps Capture Registered Sex Offender Viewing Indecent Images of Children
- The family of a 19-year-old who died following a collision in which she was a rear seat passenger are supporting a police message to driv
- The family of a 19-year-old who died following a collision in which she was a rear seat passenger are supporting a police message to drive to the conditions of the road