Due to the nature of Willsmere as such an iconic structure with so much history, there is plenty of information on the internet regarding Willsmere. Here are some of the more notable sites:
Willsmere Heritage: https://willsmere.wordpress.com. This site has a wealth of information about willsmere and the surrounding area.
Victorian Heritage Database: http://vhd.heritagecouncil.vic.gov.au/places/622. The official heritage listing of Willsmere, stating the reasons for its significance.
Wikipedia Willsmere entry: https://en.wikipedia.org/wiki/Kew_Asylum
Boroondara Planning Scheme: http://planning-schemes.delwp.vic.gov.au/schemes/boroondara/ordinance/42_02s01_boro.pdf, outlining the heritage protection of the vegetation on the site and surrounding areas and outlining any rare specimens.
Willsmere is located at 1 Wiltshire Drive Kew VIC 3101. Visitor access is via Yarra Boulevard.