Hello Roger,
I have found the 1990- 1991 list, the details are :-
630.201 Leucojum autumnale Morocco, Middle Atlas Range, N of Ksar-el Ksiba. 1200m. S-facing limestone slope. ( 1989 seed ex hort John Blanchard- seems quite distinct from the preceding with pure-white bells. Both these are material coll. in 1982 under Archibald, Blanchard & Salmon numbers. not listed previously) (20+ seeds )B (£1.50)