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The name of an ancient collection of original writs, accompanied with brief commeuts and explanations, compiled iu the time of Edward 111. This is commonly called "Old Natura Breviuin," (or "O. N. B.,") to distinguish it from Fitzher- bert's Natura Brevium, a later work, cited as "F. N. B.," or "Fitzh. Nat Brev." Natura fide jussionis sit strictissimi juris ct non durat vel extendatur de re ad rem, de persona ad personam, de tempore ad tempus. The nature of the contract of suretyship is strictissimi juris, and cannot endure nor be extended from thing to thing, from person to person, or from time to time. Burge, Sur. 40. Natura non facit sal turn; ita nec lex. Nature makes no leap, [no sudden or irregular movement;] so neither does law. Co. Litt. 238. Applied in old practice to the regular observance of the degrees in writs of entry, which could not be passed over per solium. Natura non facit vacuum, neo lex