_Encyclopedia of Indexes, or Tables of Contents._--I should like your opinion, and that of the readers of "N. & Q.," as to the desirableness and practicability of forming a collection of the indexes of those books most commonly required to be referred to by authors and scholars. In reading up on any subject, when it is wished to know whether any author treats upon it, mainly or incidentally, his works must be examined at a great expense of time and labour. Perhaps some of your learned readers will express their views as to the value of such a thesaurus, and give suggestions as to the principles which ought to regulate its execution. THINKS I TO MYSELF. _Errata in Nichols' "Collectanea Topographica et Genealogica."_--Works of this kind, unless strictly accurate, cause great perplexity and confusion, and are indeed of little use. I therefore wish to note in your pages that at vol. viii. p. 38. of the above work it is stated that Babington "married Juliana, daughter of Sir _Thomas_ Rowe, Alderman of London." _Harl. MSS._ 1174. p. 89., 1551. p. 28., 1096. p. 71., inform us that Julian Rowe, daughter of Sir William Rowe, who was Lord Mayor of London in 1592, married Francis Babington. Sir William and Sir Thomas were first cousins. In the same page Sir Thomas Rowe is stated to have died in 1612; on his tomb we are told that he died in 1570. TEE BEE. * * * * * QUERIES. GENESIS IV. 7. Can any of your learned Hebraists elucidate the passage in Gen. iv. 7., which called forth the following remarks from Bishop Sandford? "As yet I cannot abandon the literal interpretation of the words [Hebrew: LAPETACH CHAT`A'T ROBEITS], and I am much surprised that, in all the criticism bestowed on this verse by Davison and the authors whom he quotes, nothing is said of the word [Hebrew: PETACH]. I do not know of any place in Holy Scripture where this word is used figuratively, and unless this can be shown, there is no supporting so strong a metaphor as the advocates of the figurative meaning of the passage contend for. Davison takes no notice of the remainder of the verse.... Now the words are remarkable; they are the same as those in which the Lord declares the subjection of Eve to her husband, Gen. iii. 16. I have always thought this passage (Gen. iv. 7.) to allude to Abel; and to promise to Cain the continuance of the priority of primogeniture, if he were reconciled to God."--_Remains of Bishop Sandford_, vol. i. p. 135.