Here is Robert Murray M'Cheyne's reading plan for May

Thanks to http://www.wholesomewords.org/family/bibleread/sword.html

MAY Bible Reading Schedule 4
Date	Family	-	Secret	-
1	Num. 8	Ps. 44	Song 6	Heb. 6
2	Num. 9	Ps. 45	Song 7	Heb. 7
3	Num.10	Ps. 46,47	Song 8	Heb. 8
4	Num.11	Ps. 48	Isa. 1	Heb. 9
5	Num.12,13	Ps. 49	Isa. 2	Heb. 10
6	Num.14	Ps. 50	Isa. 3,4	Heb. 11
7	Num.15	Ps. 51	Isa. 5	Heb. 12
8	Num.16	Ps. 52-54	Isa. 6	Heb. 13
9	Num.17,18	Ps. 55	Isa. 7	James 1
10	Num. 19	Ps. 56,57	Isa. 8-9:7	James 2
11	Num. 20	Ps. 58,59	Isa.9:8-10:4	James 3
12	Num. 21	Ps. 60,61	Isa.10:5-34	James 4
13	Num. 22	Ps. 62,63	Isa. 11,12	James 5
14	Num. 23	Ps. 64,65	Isa. 13	1 Pet. 1
15	Num. 24	Ps. 66,67	Isa. 14	1 Pet. 2
16	Num. 25	Ps. 68	Isa. 15	1 Pet. 3
17	Num. 26	Ps. 69	Isa. 16	1 Pet. 4
18	Num. 27	Ps. 70,71	Isa. 17,18	1 Pet. 5
19	Num. 28	Ps. 72	Isa. 19,20	2 Pet. 1
20	Num. 29	Ps. 73	Isa. 21	2 Pet. 2
21	Num. 30	Ps. 74	Isa. 22	2 Pet. 3
22	Num. 31	Ps. 75,76	Isa. 23	1 John 1
23	Num. 32	Ps. 77	Isa. 24	1 John 2
24	Num. 33	Ps.78:1-37	Isa. 25	1 John 3
25	Num. 34	Ps.78:38-72	Isa. 26	1 John 4
26	Num. 35	Ps. 79	Isa. 27	1 John 5
27	Num. 36	Ps. 80	Isa. 28	2 John 1
28	Deut. 1	Ps. 81,82	Isa. 29	3 John 1
29	Deut. 2	Ps. 83,84	Isa. 30	Jude 1
30	Deut. 3	Ps. 85	Isa. 31	Rev. 1
31	Deut. 4	Ps. 86,87	Isa. 32	Rev. 2