The name of an ancient collection of original writs, accompanied with brief comments and explanations, compiled in the time of Edward III. This is commonly called “Old Natura Brevium,” (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 git strictissimi juris et non durat vel extendatur de re ad rem, de persona ad personam, de tempore ad tempos. 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 faeit sal turn; ita nee 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 saltum. Natura non facit vacuum, nee lex su pervacuum. Nature makes no vacuum, the law nothing purposeless. Co. Litt 79. Naturse vis maxima; natura bis maxima. The force of nature is greatest; nature is doubly great 2 Inst 564.