 Renaissance <unk> and science figured large in the Dudley children 's education . In 1553 Jane Dudley herself commissioned two works from the mathematician and <unk> John Dee about heavenly <unk> and the tides . Jane Dudley was close to her children ; her eldest son , Henry , had died during the siege of <unk> in 1544 , aged 19 . A <unk> she wrote in 1552 under a letter by her husband to their then eldest son , John Dudley , 2nd Earl of Warwick , reads : " your <unk> <unk> that <unk> you <unk> <unk> Jane Northumberland " . She also had health problems : In <unk> her husband was unwilling to leave her side , because she " had had her fit again more extreme that she had any time yet . " 
