Box containing one hundred and ninety-nine folded plans for Thornycroft Designs T1339 - 1423. This contains folders holding the following design numbers:

T1339 - 1940 proposed design for general purpose destroyer with long endurance (became Brecon & Brissenden).
T1340
T1341
T1347
T1349-51
T1353-54
T1362
T1367-68
T1372
T1376
T1377
T1378
T1380-83
T1889-90
T1393
T1401-02
T1405-07
T1410 & T1413-20 [Same folder]
T1422-23