This prompted me to do my best to mock up a box of Gitanes.
Gitanes are a French cigarette brand, introducted to the world in 1910. The packs sport the silhouette of a Spanish gypsy woman playing the tambourine. Gitaines 'Mais' use corn-paper and have been available since 1918. An integral filter wasnt introduced until 1956.
Print it out, cut it out, and fold on the lines. Glue the tabs to make it into a box-ish shape. You might want to fill it with rolled paper tubes mocked up to look like cigarettes, or with cigarettes if you're into that sort of thing (if you chose to do this, its my understanding that filtered Gitaness didn't come out into the 1950s).
This can be used for the encounter with the Wellingtons, or at other times. The possibilities are really endless. Just dont get Cancer. We know smoking causes cancer - however as Call of Cthulhu players, the question is..... Cancer or Insanity.....