- Macready, Charles [actor] 1, 2n.188
- Maddock, James 1, 2n.72
- Manchester 1, 2
- Manners, Lord [of Ufford] 1, 2n.2
- Manton [of Deeping] 1
- Maple Hill 1
- Market Deeping 1, 2, 3, 4, 5, 6, 7n.32,
- see also Deeping
- Marsh, Herbert, Rt Revd, Bishop of Peterborough 1, 2, 3n.164, 4n.14
- Marsh, Mrs Marianne 1
- Martin Frederick 1, 2
- Martindale, Alan 1, 2n.48
- Marvel, Andrew 1, 2
- Mavor, William 1, 2n.102
- Maxey 1, 2, 3
- Messing, S. 1, 2, 3n.66
- Militia 1, 2, 3, 4, 5n.82, 6
- Milking Pail, The, song 1, 2n.63
- Milton, John 1, 2, 3, 4, 5n.32, 6n.55,
- see also Paradise Lost
- Milton Farm 1
- Milton Hall 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14n.46, 15n.176, 16, 17n.85, 18n.128, 19, 20n.270, 21n.277
- Milton, Lady 1, 2, 3n.247
- Milton, Lord 1, 2, 3, 4, 5, 6, 7n.12, 8n.45, 9n.53
- Miserys of Human Life, The 1, 2n.55
- Mobbs, James 1
- Montgomery, James 1, 2, 3, 4n.143, 5, 6n.14
- Moor [Helpston neighbour] 1n.91
- Moore, Thomas 1, 2, 3, 4n.48
- Moore’s Almanack, see Old Moore’s Almanack
- More, Hannah 1, 2n.48, 3n.187
- Morgan, Lady 1, 2n.214
- Morgan, Sylvanus 1, 2n.48
- Morris [Clare’s uncle], see Stimson, Morris
- Morton 1, 2n.159
- Mossop, Revd Charles [of Helpston] 1, 2, 3, 4n.48, 5n.141
- Mother Bunch’s Fairy Tales 1, 2n.3
- Mother Hubbard and her Cat 1
- Mother Hubbard and her Dog 1
- Mother Shipton’s Legacy 1, 2n.3
- Moulton 1n.85
- Mounsey, Revd Thomas 1, 2n.125
- Mowarks 1, 2n.214
- Mowbray [of Glinton] 1
- Munden [actor] 1, 2n.188
- Murray, John 1, 2n.215