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Hanau, Count of, 84

Hanneman, Adriaen, 132, 133, 134, 188; portrait of William, 133

Harrison, John, 284

Hartlib, Samuel, 316

Hatfield Chase, Lincolnshire, 232, 237–8

Heenvliet, Jan van der Kerckhoven, Lord of, 68

Heidelberg, 86; gardens, 48, 48, 219, 228–31

Hein, Admiral Piet, 84

Heinsius, Daniel, 354

Held, Julius, 156, 157

Hellevoetsluis, 6, 15

Henrietta Maria, Queen of Charles I, 70, 72–3, 75, 78, 116, 163, 186–8, 212–13, 351

Henry Frederick, Prince of Wales, 108

Herbert, Admiral Arthur, Earl of Torrington, 16

Hesse, Johan van, 172

Hoefnagel family, 98

Hoefnagel, Jacob, 98

Hoefnagel, Joris, 292

Hofwijk, Voorburg (Sir Constantijn Huygens’ estate), 164, 166, 183, 208, 210, 211, 212–13, 214, 215–19, 227–8, 229, 233–4, 245, 308

Hollandine, Louise, 132

Holles, Sir Frescheville, 284

Holmes, Sir Robert, 283–9, 284, 326–7, 329

Hondius, Hendrik, 126

Honselaarsdijk, 22, 85, 204, 212, 224, 235–7, 236, 241, 245

Honthorst, Gerrit (Gerard) van, 85, 88, 90, 126, 131, 138

Hoogstraten, Samuel van, 145, 147; The Slippers (painting), 146

Hooke, Robert: on William’s invasion, 15; on Prince Rupert’s drops, 203; scientific endeavour, 266; and clock and watch mechanism, 267–8, 279–82, 284, 291, 301, 306; and determination of longitude, 280–1, 285, 288; reputation, 293, 296; Christiaan Huygens jr criticises, 296; in controversy with Auzout, 297–8, 302–3, 305–8; on need for high-quality lenses, 297; involvement with Royal Society, 298–9; lens-making machine, 298–302, 304, 306; as Curator of Experiments at Royal Society, 301, 313; leaves London (1665), 302, 306; supports Stuart royals, 308; career setbacks, 313; lectures at Royal Society, 313–14; work on optics, 313; ill health, 314; on Chinese medical practices, 344–5; and inscriptions for Monument to Great Fire of London, 354; discusses Temple of Solomon with Wren, 357; Micrographia, 291–3, 294–5, 296–300, 299, 306–7, 307, 312–13

Hortus Pembrochianus, 47

Hoskins, Sir John, 315

Hudson, Henry, 321

Huguenots: support William, 31; flee France after revocation of Edict of Nantes, 41

Huis ten Bosch, The Hague, 89–90, 138, 209, 246

Hume, Sir Alexander, 190, 271

Hutchinson, Colonel John, 116

Huygens family, 47, 92, 93

Huygens, Christiaan, jr: cosmopolitanism, 7; career, 93; and Prince Rupert’s drops, 203; at Hofwijk, 213; mental health problems, 213, 290, 308; requests copy of Evelyn’s Sylva from Royal Society, 227; correspondence with Philips Doublet, 245–6; develops and tests watch and clock mechanisms, 263, 266–74, 267, 276–84, 289–91, 314–15, 329; in France, 264, 308; scientific interests and activities, 264, 266; in England, 274, 309–10, 315; friendship and correspondence with Moray, 274, 277, 300, 306, 308; portrait, 275; and determination of longitude at sea, 283; questions Holmes’s report, 285–6; and Hooke’s Micrographia, 291, 293, 296, 298; interest in microscopy, 292–3; and lens-making, 292, 300; criticises Hooke, 296, 304; and Hooke’s lens-grinding machine, 300–2, 306; in The Hague during Great Plague (1665), 305; retires to father’s estate, 308; elected first overseas member of Royal Society, 309, 316; reads and approves of Newton’s Principia, 309; attends Royal Society meetings, 310, 313; audience with William, 310–11; and Newton’s political involvement, 311–12; relations with Newton, 312–13; reputation, 315–16; appointment in Paris, 316; planetary observations, 316–18; Discours sur la cause de la pesanteur, 314; Horologium Oscillatorium, 284, 289–90; Systema Saturnium, 316–17; Traité de la lumière, 309, 313

Huygens, Christiaan, sr, 93, 97, 102, 108

Huygens, Constantia see Wilhem, Constantia de

Huygens, Sir Constantijn: and William’s invasion, 7; and William’s expectation of English throne, 80; as art adviser to courts, 82–3, 85, 89–90, 112, 118, 125–7, 138–9, 207, 210; career and influence, 91–3, 100, 111–12; portrayed, 92, 96, 128, 131–2, 134, 144, 155, 156–9, 206, 342; in England, 94–8, 101, 105–6, 109–10, 166–7, 350; musical virtuosity and activities, 95–8, 159, 163–4,