In this collection there are two bookplates that have related items in the same collection. Both bookplates are linked to the plate used to print said bookplate, and vice versa. 'The Ex Libris of Epes Sargent' is related to the 'Copper Plate for Ex Libris of Epes Sargent', and the 'Ex Libris of Jacob Weiss' is related to the 'Woodblock for Ex Libris of Jacob Weiss.'
While you could, in theory, be able to see that these were linked in a database due to their titles being similar, I felt that linking them via the related resource field would allow for greater discoverability. This would be especially useful in a database where the titles were not so similar, and any relationship between the two objects less obvious.