Burke's Genealogical & Heraldic Guide to the Peerage, @ 1938 ed p 1808, no title other than Lord Segrave
The cited information was published by Burke's Peerage, London, 1949 (Ref: 1938 ed p 1808, no title other than Lord Segrave) The author/originator was Burke's Peerage.
Source Notes
TITL Burke's Genealogical & Heraldic Guide to the Peerage,
Baronetage & KnightageABBR Burke's Peerage