The flags borne by the Covenanters in their struggle for liberty varied much in their details, but in the great majority of cases bore upon them the Cross of St. Andrew, often accompanied by the thistle, and in most cases by some form of inscription. Several of these are still extant. In one that was borne at Bothwell Brig, and now preserved in the Museum of the Society of Antiquaries, Edinburgh, the four blue triangles (see Fig. 92 for these) are filled with the words, "For Religion----Couenants----King----and Kingdomes." The Avondale flag was a white one, having the cross, white on blue, as in Fig. 75, in the corner. On the field of the flag was the inscription, "Avondale for Religion, Covenant, and King,"[29] and beneath this a thistle worked in the national green and crimson. A very interesting Exhibition of Scottish national memorials was held at Glasgow in 1888, and many of these old Covenant flags were there displayed. At the great Heraldic Exhibition held in Edinburgh in 1891, one of the most interesting things shown was the Cavers Standard. This is of sage green silk, twelve feet by three. It bears the Cross of St. Andrew next the staff, and divers other devices are scattered over the rest of the flag. It is in excellent preservation, and its special interest lies in the fact that it is said to have been the standard of James, second Earl of Douglas and Mar, and borne by his son at the battle of Otterburn in the year 1388. If this be so it is one of the oldest flags in existence. On the signet-ring of Mary Queen of Scots the white Cross of St. Andrew is not shown on its usual blue ground, but on a ground striped blue and yellow, the royal colours; in the same way that the St. George's Cross is shown in Fig. 71, not on a {44} white ground, but on a ground striped white and green, the Tudor colours.