Shooting in the marshes and out upon the sands was a favorite sport, and when not with the fishermen Grenfell was usually to be found with his gun stalking curlew, oyster diggers, or some other of the numerous birds that frequented the marshes and shores.  Barefooted, until the weather grew too cold in autumn, and wearing barely enough clothing to cover his nakedness, he would set out in early morning and not return until night fell.

As often as not he returned from his day’s hunting empty handed so far as game was concerned, but this in no wise detracted from the pleasure of the hunt.  Game was always worth the getting, but the great joy was in being out of doors and in tramping over the wide flats.  With all the freedom given him to hunt, he early learned that no animals or birds were to be killed on any account save for food or purposes of study.  This is the rule of every true sportsman.  Grenfell has always been a great hunter and a fine shot, but he has never killed needlessly.

Young Grenfell through these expeditions soon learned to take a great deal of interest in the habits of birds and their life history.  This led him to try his skill at skinning and mounting specimens.  An old fisherman living near his home was an excellent hand at this and gave him his first lessons, and presently he developed into a really expert taxidermist, while his brother made the cases in which he mounted and exhibited his specimens.

His interest in birds excited an interest in flowers and plants and finally in moths and butterflies.  The taste for nature study is like the taste for olives.  You have to cultivate it, and once the taste is acquired you become extremely fond of it.  Grenfell became a student of moths and butterflies.  He captured, mounted and identified specimens.  He was out of nights with his net hunting them and “sugaring” trees to attract them, and he even bred them.  A fine collection was the result, and this, together with one of flowers and plants, was added to that of his mounted birds.  In the course of time he had accumulated a creditable museum of natural history, which to this day may be seen at Mostyn House, in Parkgate; and to it have been added specimens of caribou, seals, foxes, porcupines and other Labrador animals, which in his busy later years he has found time to mount, for he is still the same eager and devoted student of nature.

During these early years, with odds and ends of boards that they collected, Grenfell and his brother built a boat to supply a better means of stealing upon flocks of water birds.  It was a curious flat-bottomed affair with square ends and resembled a scow more than a rowboat, but it served its purpose well enough, and was doubtless the first craft which the young adventurer, later to become a master mariner, ever commanded.  Up and down the estuary, venturing even to the sea, the two lads cruised in their clumsy craft, stopping over night with the kind-hearted fishermen or “sleeping out” when they found themselves too far from home.  Many a fine time the ugly little boat gave them until finally it capsized one day leaving them to swim for it and reach the shore as best they could.