You never can tell what maybe useful in tracing a person's descent.

6 seconds sound clip from Batman (1966) - Batman Stands Pat (S1E14) TV Series.

You can hear this line at 00:10:34 in the Blu-ray version of the movie.

Quote context

[...]

- I got license to run this joint, if that's what you mean?

- Now, tell me... Perhaps if you have some records of your family lineage... In your office, hmm?

- All I got in my office is my hat.

- Your... Well... Maybe that could tell me something.

- It's just a little hat.

- You never can tell what maybe useful in tracing a person's descent.

- Descent? It ain't no descent to run a bowling alley.

- I mean, family descent. The natural order of succession from one's ancestors. Or even older forms.

- Monkeys?

- Sorry buddy. Turkey ain't no handle handed down from my grandpa. It's a nick name, in the lingo of ten pins.... It means three strikes.

- And Bowinkle means.... Bowinkle.

[...]