Your correspondent "E.R.J.H." (No. 21. p. 330.) inquires whether any general statistical returns, compiled from our early parish registers, have been published. It must be a matter of regret to all who are acquainted with the value of these national records--which for extent and antiquity are unequalled in any other country--that this question cannot be answered affirmatively. By the exertions of the late Mr. Rickman, their importance, in a statistical point of view, has been shown, but only to a very limited extent. In 1801, being entrusted with the duty of collecting and arranging the returns of the first actual enumeration of the population, he obtained from the clergyman of each parish a statement of the number of baptisms and burials recorded in the register book in every tenth year from 1700, and of marriages in every consecutive year from 1754, when the Marriage Act of George II. took effect. The results were published with the census returns of 1801; but, instead of each parish being separately shown, only the totals of the hundreds and similar county divisions, and of a few principal towns, were given. In subsequent "Parish Register Abstracts" down to that of 1841, the same meagre information has been afforded by an adherence to this generalising system. In 1836, with a view of forming an estimate of the probable population for England and Wales at certain periods anterior to 1801, Mr. Rickman, acting upon the result of inquiries previously made respecting the condition and earliest date of the register books in every parish, applied to the clergy for returns of the number of baptisms, burials, and marriages registered in three years at six irregular periods, viz. A.D. 1570, 1600, 1630, 1670, 1700, and 1750. The clergy, with their accustomed readiness to aid in any useful investigation, responded very generally to the application, and Mr. Rickman obtained nearly 3000 returns of the earliest date required (1570), and nearly 4000 (from not much less than half the parishes of England) as far back as 1600; those for the more recent periods being tolerably complete from all the counties. The interesting details thus collected have not been published; nor am I able to say where the original returns, if still extant, are deposited. In pursuance of this design, however, Mr. Rickman proceeded with these materials to calculate the probable population of the several counties on the supposition that the registered baptisms, &c., in 1570, 1600, and at the other assigned periods, bore the same proportion to the actual population as in 1801. The numerical results are embodied in a table which appears in the _Census Enumeration Abstract_ for 1841 (Preface, pp. 36, 37.), and it is stated that there is reason for supposing the estimate arrived at to be an approximation to the truth.