to the detenu, as soon as may be, after the detention, ordinarily not later than five days, and in exceptional circumstances and for reasons to be recorded in writing, not later than 15 days from the date of detention”, further particulars of those grounds in compliance with the second constitutional imperative spelled out from Article 22(5) in Khudi Ram's case, are required to be communicated to the detenu, as soon as may be practicable, with reasonable expedition. It follows, that if in a case the so-called “grounds of detention” communicated to the detenu lack the basic or primary facts on which the conclusions of fact stated therein are founded, and this deficiency is not made good and communicated to the detenu within the period specified in Sec. 3(3) the omission will be fatal to the validity of the detention. If, however, the grounds communicated are elaborate and contain all the “basic facts” but are not comprehensive enough to cover all the details or particulars of the “basic facts”, such particulars, also, must be supplied to the detenu, if asked for by him, with reasonable expedition, within a reasonable time. What is “reasonable time conforming with reasonable expedition”, required for the supply of such details or further particulars, is a question of fact depending upon the facts and circumstances of the particular case. In the circumstances of a given case, if the time taken for supply of such additional particulars, exceeds marginally, the maximum fixed by the statute for communication of the grounds it may still be regarded “reasonable”, while in the facts of another case, even a delay which does not exceed 15 days, may be unjustified, and amount to an infraction of the second constitutional imperative pointed out in Khudi