He was born in London, the son of Silas Titus, a salter and Constatia (Constance) Colley. He was educated at Christ Church, Oxford, where he matriculated in 1638, and the Middle Temple.
Killing No Murder
Titus began his political aspirations by writing a pamphlet titled Killing No Murder in 1657 during The Protectorate period of the English Interregnum era of English history. The pamphlet advocated the assassination of Oliver Cromwell. Due to the danger involved in writing such a politically charged opinion against the Protector, Killing No Murder was published under the pseudonym 'William Allen'.
Cromwell was said to have been so disturbed after the publication of Killing No Murder that he never spent more than two nights in the same place and always took extreme precaution in planning his travel.
Titus' authorship of this pamphlet has been disputed in some circles; it has also been attributed to Edward Sexby or a man by the real name of William Allen. These attributions are usually unfounded as King Charles II awarded Titus the title of Gentleman of the Bedchamber for his service in authoring the work.
Though not eloquent, he would often illustrate his speeches with a humor that rendered them effective. For instance, when it was complained that Titus made sport of the House of Commons of the United Kingdom, he retorted that "things were not necessarily serious because they were dull". Once again, when Charles II offered to impose limitations on a Roman Catholic Church sovereign rather than exclude his brother from the throne, Titus likened such a plan to "having a lion in the lobby and then voting to secure ourselves by letting him in and chaining him, rather than by keeping him out".
Titus also served King James II but later transferred his allegiance to William III. During his life he held a number of royal appointments: Keeper of Deal Castle (1661-1669), Colonel of the Cinque Ports Militia (1661-1669), Commissioner for Assessment for Middlesex (1661-1663), for Kent (1664-1669), for Leicestershire (1673-1679), for Hertfordshire (1673-1680), and for Huntingdonshire (1677-1680), Assistant, Royal Adventurers into Africa (1663), Assistant, Royal Fishing Company (1664), Captain of a Company in the Admiral's Regiment (1666), Privy Councillor (1688), Commissioner for Trade and Plantations (1688-1674), Conservator of the Bedford Level (1679-death), Deputy-Lieutenant of Hertfordshire (1680-1681, 1687-1689, 1701-death) and Commissioner for Inquiry into Recusancy Fines (1687).
Mentioned in Samuel Pepys' Diary
Captain Titus was mentioned in the diary kept by Samuel Pepys on two occasions. The following excerpts come from the entries of those days.
- 7 May 1660
"Very great deal of company come today, among others Mr. Bellasses, Sir Thomas Lenthropp, Sir Henry Chichley, Colonel Philip Honiwood, and Captain Titus, the last of whom my Lord showed all our cabins, and I suppose he is to take notice what room there will be for the King's entertainment." 
- 11 October 1664
"This day with great joy Captain Titus told us the particulars of the French's expedition against Gigery upon the Barbary Coast, in the Straights, with 6,000 chosen men. They have taken the Fort of Gigery, wherein were five men and three guns, which makes the whole story of the King of France's policy and power to be laughed at." 
- Robert Clutterbuck, History of Hertford; Kingston, Civil War in Hertford; Hillier, King Charles in the I. of W.
- "Library and Archive Catalogue". Royal Society. Retrieved 21 January 2011.
- Parishes - Bushey | British History Online
- Monday 7 May 1660 (Pepys' Diary)
- Tuesday 11 October 1664 (Pepys' Diary)
- "Titus, Silius". Dictionary of National Biography. London: Smith, Elder & Co. 1885–1900.
- RootsWeb.com: Family History for the House of Smith
- Edgar Allan Poe Marginalia - Part IV
- 1911 Encyclopedia
- Sixty Years of an Agitator's Life
- University of Western Ontario: Books Online
- The History of England From the Invasion of Julius Caesar to the Revolution in 1688 (1778) Volume VI
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