  Let $\mathcal{T}$ be the set of spanning trees of $G$ and let $L(T)$ be the
number of leaves in a tree $T$. The leaf number $L(G)$ of $G$ is defined as
$L(G)=\max\{L(T)|T\in \mathcal{T}\}$. Let $G$ be a connected graph of order $n$
and minimum degree $\delta$ such that $L(G)\leq 2\delta-1$. We show that the
circumference of $G$ is at least $n-1$, and that if $G$ is regular then $G$ is
hamiltonian.
