Add Signal Hill Whisky, balsam fir syrup, lemon juice, egg white and 3-4 spruce tips to a cocktail shaker with ice. Shake vigorously for 10-15 seconds. Remove the ice and shake again for another 10-15 seconds. Double strain into a chilled coupe glass. Drip 4-5 dashes of Angostura bitters over top and with a skewer draw a line through. Garnish with 4-5 spruce tips around the top for aromatics.