9 10 11 12 1 2 3 4 5 6 7 8 9 10 MONDAY A ------------ ------------ B ------------ --------- C 8.45---------- D ------------ ------------ E ------------ ------------- F ------------ ---------- G ------------ ------------ H ------------ ---------- 9 10 11 12 1 2 3 4 5 6 7 8 9 10 TUESDAY A ------------ --------- B ------------ ------------ C ------------ ------------ D 8.45---------- E ------------ --------- F ------------ ------------ G ------------ --------- H ------------ ------------ 9 10 11 12 1 2 3 4 5 6 7 8 9 10 WEDNESDAY A ------------ B ------------ --------- C ------------ ------------ D ------------ ------------ E 8.45---------- F --------- --------- G --------- ------------ H ------------ ------------ 9 10 11 12 1 2 3 4 5 6 7 8 9 10 THURSDAY A ------------ ------------ B ------------ C ------------ ------------ D ------------ ------------ E --------- ------------ F 8.45---------- G ------------ ------------ H ------------ ------------ 9 10 11 12 1 2 3 4 5 6 7 8 9 10 FRIDAY A ------------ ------------ B ------------ ------------ C ------------ --------- D ------------ --------- E ------------ ------------ F ------------ G 8.45---------- H ------------ ------------ 9 10 11 12 1 2 3 4 5 6 7 8 9 10 SATURDAY A ------------ --------- B ------------ ------------ C ------------ --------- D ------------ --------- E ------------ ------------ F ------------ ------------ G ------------ ------------ H 8.45---------- FIG. 6 (Section 84). Hours of duty 42 per week. Each assistant has a half-day and an evening off, works one night until 10 o’clock, and comes on one morning at 8.45. The library is assumed to be open all the week, and where an early-closing day is in vogue, the time-sheet is simplified by confining nearly all the half-holidays to that day.