J. Denis Summers-Smith
... that J. Denis Summers-Smith became an expert on sparrows by travelling as an expert in tribology?
... that <b id="mwA0s"><a href="./J._Denis_Summers-Smith" id="mwA0w" rel="mw:WikiLink" title="J. Denis Summers-Smith">J. Denis Summers-Smith</a></b> became an expert on <a class="mw-disambig" href="./Sparrow" id="mwA00" rel="mw:WikiLink" title="Sparrow">sparrows</a> by travelling as an expert in <a href="./Tribology" id="mwA04" rel="mw:WikiLink" title="Tribology">tribology</a>?