May I offer this slight alternative? I think that A7 works better than Db.

Bar
1 | C = = = | Underneath the lantern
2 | G7 = G G7 | by the barrack gate,
3 | G7 = = = | Darling I remember
4 | G (G) C = |the way you used to wait


5 | F = (F) F | 'Twas there that you whispered
6 | (C) C Cmaj7 Am7 | tenderly,
7 | (G) G7 (G) G7 | That you lov'd me,
8 | (C) C = = | you'd always be,

9 | G7 = = = | My Lilli of
10 | C = = A7 | the lamplight
11 | (G) = G7 = | my own Lilli
12 | C = = = | Marlene.