No, the Indians were working in one of DeMille's pictures.
6 seconds sound clip from the Christmas in July (1944) classic radio play.
You can hear this line at 00:54:56 in the radio play.
Quote context
[...]
- Dick, you'd better call me L.B. Yep, it's a rule here you know.
- The producer has to be called by his initials.
- Well, I guess when you first came to Hollywood, things were a little different than they are now.
- Uh huh.
- When I got off the train, there were hundreds of Indians all over the place.
- Oh, then you were here before Mr. DeMille, huh?
- No, the Indians were working in one of DeMille's pictures.
- I was a youngster of thirty-five or so.
- How old were you when you started in pictures Linda?
- Lionel probably started on the stage about the same age, huh?
- Rompers?
[...]