  For $n\ge 1$ we show that the length 1 nested Hilbert scheme of the total
space $X_n$ of the line bundle $\mathcal O_{\mathbb P^1}(-n)$, parameterizing
pairs of nested 0-cycles in $X_n$, is a quiver variety associated with a
suitable quiver with relations. This generalizes previous work about nested
Hilbert schemes on $\mathbb C^2$ in one direction, and about the Hilbert
schemes of points of $X_n$ in another direction.
