The success of the film significantly boosted the book's sales. Darlington adapted his novel for a 1924 play of the same name. In 1930 a sound film adaptation "Alf's Button" was released, also directed by Kellino. A third film based on the story "Alf's Button Afloat" was released in 1938 directed by Marcel Varnel and starring Bud Flanagan and Chesney Allen. HD 143699  HD 143699 is a single star in the southern constellation of Lupus. It is a dim star but visible to the naked eye with an apparent visual magnitude of 4.90. Based upon an annual parallax shift of , it is located around 350 light years away. It is most likely (90% chance) a member of the Upper Centaurus-Lupus subgroup of the Sco OB2 moving group. This star has a stellar classification of B5/7 III/IV, suggesting it is an evolving star that is entering the giant stage. However, according to Zorec and Royer (2012) it is only 56% of the way through its main sequence lifespan. It is a chemically peculiar magnetic B star, showing an averaged quadratic field strength of . Helium-weak, it displays an underabundance of helium in its spectrum. Radio emissions have been detected from this source. HD 143699 has 4.3 times the mass of the Sun and 4.4 times the Sun's radius. It has a high rate of spin with a projected rotational velocity of 123 km/s. The star is radiating 438 times the Sun's luminosity from its photosphere at an effective temperature of 14,521 K.     1 Lupi  1 Lupi is a solitary giant star in the southern constellation of Lupus. It has the Bayer designation i Lupi; "1 Lupi" is the Flamsteed designation. The apparent visual magnitude is 4.90, which indicates it is faintly visible to the naked eye. Based on parallax measurements, this star is approximately 1,800 light years from the Sun. It is moving closer to the Earth with a heliocentric radial velocity of −23 km/s. Houk (1978) assigned the spectral classification of this star as F1III, which suggests it is an F-type (yellow-white) star that has evolved away from the main sequence and expanded into a giant. However, Gray et al. (2001) found a class of F0 Ib-II, matching a supergiant/bright giant star.