About the DeHavilland DH91

In the early 1940's, seven of this aircraft were flying passengers/mail service. Two of them used to fly to Lisbon. Despite my effort and googlin' around, I could not find wich were the ones flying to Lisbon :(
Can someone help me? Wich were the names of the 2 (I thin they were two) De Havilland 91 flying to Lisbon in the early 40's?
Thanks
Can someone help me? Wich were the names of the 2 (I thin they were two) De Havilland 91 flying to Lisbon in the early 40's?
Thanks
