sentences:  A nebuly line can be constructed from two parallel rows of circles, one row staggered with respect to the other, so that each circle is tangent to two circles in the other row.Each circle in the lower row should touch the two above at about 45 and 135 degrees and each circle in the upper row should touch the two below at 225 and 315 degrees.The mediaeval arms of the Dauntsey family of Wiltshire, England, were "barry nebuly".