His mild eyes behind thick-lensed glasses, his bulging forehead, uncombed scalp lock and careless clothes sometimes make people take him for a clerk in a side-street seed store.
He peers inquisitively through silver spectacles, his grey mustache and hair are scraggly, uncombed.
Thirty-five Rembrandt etchings include nearly all of the landscapes he did in the medium, and eight self-portraits, ranging from a view of the uncombed but aspiring artist at 24 .