Harriet Drum and her son Oscar and his wife Lottie were all photographers. They all worked together at one point and after Harriet died, Oscar and Lottie carried on the business. They worked in Longton, then Jackson , Kansas, and finally from 1910 on, in Bartlesville, Oklahoma.
Harriet (Forrest) Drum was born
Oscar Drum was born
Lottie (Bastian) Drum was born
(US Census, City Directory) Oscar and mother Harriet work together as photographers
(US Census) Oscar and Lottie marry, with Harriet, all three work as photographers
(Ancestry) Oscar’s mother Harriet dies.
(US Census) Listed as Commercial Photographer at Drum Studio, wife Lottie as no occupation.
(US Census) as Photographer (last mention of photography)
1915 - 1927
no photograph activity found
1929 - 1933
Oscar shown as farmer only
Oscar at 75, no occupation found
(Find-a-Grave) Oscar dies.
(Find-a-Grave) Lottie dies.
There is no mention anywhere of Drum and a Railroad Photo Car as shown on the card to the right. The only clues that tie these two photographs together are, the comma after the name "Drum" and both photographs were found in Kansas.
The photograph on the left was probably done between 1888 and 1912.
Update 30 Jul 2018:
Further evidence that the Drum family used a photo car. The example at the right is imprinted Lamar, Colorado. Again, there is a comma after the name Drum.
example from auction site
Update 24 Aug 2018:
Following are some examples from the personal collection of S Tennant.
example contributed by S Tennant