You can search the Illingworth collection on the Library Catalogue. There is more than one way of searching the collection.
You can use the advanced search and include 'Illingworth' as author and then your search term in the row underneath.
Enter your search term in the main search box, selecting Digital from the drop down. If there are relevant cartoons in the collection, 'Illingworth, Leslie Gilbert' will appear in the filters list under 'Author/Creator' - click on this and the relevant results will appear.
You can also browse through the whole Illingworth collection on our Catalogue.