As remarked by Admiral Sir Massie Blomfield[160], this "jack" is not shown in the "illustrations of the flagships of the Expedition of 1596 reproduced in the 'Naval Miscellany,'[161]" so that the suggestion was probably not received with favour.
There is no mention of, or provision for, "jacks" in the inventories which accompanied the report of the committee that inquired into the state of the navy in 1618. Sir Julian Corbett has pointed out[162] that the earliest instance of the use of the word "jack" to denote a flag occurs in the orders issued by Sir John Pennington to one of his captains on 3rd July, 1633. The original has not survived, but the copy[163] is in a contemporary hand and is corroborated by Pennington's Journal, now among the MSS. of Lord Muncaster.
In the summers of the years 1631, 1633 and 1634 Pennington was in command of a small squadron as Admiral of the Narrow Seas, charged especially with the duty of freeing the coast from pirates. He tells us in his journal[164], under the above date (3rd July, 1633):
In the morninge it blew very hard at SW by W. Aboute noone we weyed--leavinge the 8th Whelpe in Catt Water and stoode of to sea with the rest of our Fleete, knowinge it to bee a very hard matter for any small vessels to keepe the sea in such fowle weather, and the likelyest place for them to shelter in with these winds was Torbaye, for which place we stoode, causinge the 10th Whelpe to goe a head of us and close aboard the shore, with her coullers and ordynance in, that shee might not bee suspected to bee one of our Fleete, the better to intrap any Pyrates.
The order, which is dated the same day on board the 'Vanguard,' Pennington's flagship, is evidently the one given to the 10th Whelp[165]. It contains instructions as to rendezvous in case the ships lost company, and continues as follows:
you are to looke out carefully for these pirates night and day; that if it be possible wee maie intrapp them. You are alsoe for this present service to keepe in yo^r Jack at yo^r Boultsprit end and yo^r Pendant and yo^r Ordinance[166].
The fact that the position of the "Jack" is defined in this order tends to show that the term had not yet become common, and this is fully confirmed by a passage added by Sir Nathaniel Boteler to one[167] of the manuscript copies of his well-known _Six Dialogues about Sea Services_, written about the year 1634.