The birth (21 January 1888) of Frank Sinclair Lundy was registered in Sunderland, Durham, England during the first quarter of 1888. His marriage to Mary Elliott was registered in Sunderland, Durham, England during the second quarter of 1914. He resided with his wife at Stockton-On-Tees, Durham, England in 1939. He was a "Mechanical Engineer, Heavy Chemical Forestry".

Wills and Administrations, 1954
Lundy, Frank Sinclair, of Sanderson House, 2, Tankerville-terrace, Jesmong, Newcastle-upon-Tyne, died 20 December 1953 at The Royal Victoria Infirmary, Newcastle-upon-Tyne.
Probate Newcastle-upon-Tyne 18 February to Mary Lundy, widow and Harry Ernest North, industrial chemist. Effects £5925 6s. 5d.

The Institution of Mechanical Engineers
Proposal for membership, 08 December 1919.
Lundy, Frank Sinclair, Senior Draughtsman, Airship Office, Armstrong Naval Yard, Walker-on-Tyne.
Exampting Examination:
(over age). Age 31, born 21 January 1888, Sunderland.
General Education:
Hylton School, Sunderland; Bede Collegiate School, Sunderland, 1900-2.
Technical Education:
Eng. Day Course, Sunderland Tech. Coll., 1904-8. Hons. Diploma in Mech. Eng., Sir William Allen, Scholarship.
Apprenticeship (Age 14):
5 years, 1902-9; served with Messrs. William Doxford and Sons, Sunderland; 6 months per year 1904-8 spent at S. T. Coll., 3½ years spent on erection of large marine engines; 1½ years spent in d. o.
Subsequent career:
2 years. 1909-11; Draughtsman with Parsons in S. Turbine Co..
1 year, 1911-12; Senior Draughtsman with Earles' S. and C. Co., Hull.
6 years 3 months, 1912-18; Senior Draughtsman with Wallsend Slipway and Eng. Co.
1 years 6 months, March 1918-Sept. 1919; Senior Draughtsman with Armstrong, Whitworth and Co., Airship Dept.
1913-17 Evening Lecturer 6th and 7th year "Eng." at Sunderland Technical College.
1916-17 Evening Lecturer 2nd st. "Maths." at Rutherford Coll., Newcastle-on-Tyne.