Charles Tennyson has written:

'Eustace; an elegy'

'Mr. Tennyson's address to the electors of the metropolitan borough of Lambeth'

Eustace Tennyson d'Enyncourt was a British engineer known for his work in the field of metallurgy, particularly in the study of crystal structures. He also made contributions to the development of X-ray diffraction techniques for analyzing materials.

Mr. Eustace Tennyson d'Eyncourt (1868-1951) head of the British "Landship Committee" is responsible for designing and building the world's first army (military) tanks in 1916 (WWI).

D. Barron Brightwell has written:

'A concordance to the entire works of Alfred Tennyson'

Eustace Lycett's birth name is Eustace Arden Lycett.