- Main article: List of Surviving Lonsdale Records
The list of Lonsdale Records relating to the Lowther family and the Earls of Lonsdale are stored at the Cumbria Record Office (Carlisle Headquarters). The Lowther Family Estate have thousands of records listed in various categories and sub-categories ranging from DLons/L5 to DLons/L25. The records relating to the 11th Border Regiment (Lonsdale) range from DLons/L13/13/1 to DLons/L13/13/282
D LONS/L13/13/188–203
'D' Company
- D LONS/L13/13/188: Register (alphabetically arranged) of - date: October 1914 - January 1915
- D LONS/L13/13/189: File entitled “Special Orders” - date: 30 December 1914 - 25 February 1915
- D LONS/L13/13/190: Lists of allowances made to named soldiers - date: 12 March - 30 June 1915
- D LONS/L13/13/191: Stray papers including accounts, training, receipt book, nominal rolls - date: November 1914 - 25 October 1915
- D LONS/L13/13/192: File re - date: 20 March - 29 October 1915
- D LONS/L13/13/193: Conduct sheets - date: 16 November 1914 - 2 November 1915
- D LONS/L13/13/194: File re pay, allowances, laundry, stores and equipment, soldiers travelling without railway tickets, sick leave, discharges from service - date: 22 February - 18 November 1915
- D LONS/L13/13/195: File “Correspondence relating to C[ompany] Q[uarter] S[ergeant's] Duties” - date: 3 March - 18 November 1915
- D LONS/L13/13/196: File of numbered vouchers - date: 9 February - 19 November 1915
- D LONS/L13/13/197: File of receipts for equipment and other goods and services - date: 13 March - 22 November 1915
- D LONS/L13/13/198: Copy monthly accounts of free issues of personal clothing and kits - date: March - November 1915
- D LONS/L13/13/199: Papers re recruitment in West Cumberland - date: 19 September 1914 - 23 January 1916
- D LONS/L13/13/200: Register of the issue of numbered rifles to named soldiers - date: Not dated [1915]
- D LONS/L13/13/201: Address book of soldiers [in D Company] - date: Not dated [1915]
- D LONS/L13/13/202: Musketry return - date: Not dated [1915]
- D LONS/L13/13/203: Roll of platoons 13-16 - date: Not dated [1915]
—For access to the above records please contact the Cumbria Archive Centre (Carlisle)