PETTIGREW WITH THa -BOERS. Son of the Senator! Reported to Have Joined Gen. Botha' Staff.. LONDON. Aug. 1.-4 According to a dis patch to The Dally Express from Its Lo renzo Marques correspondent. Frank Petti- grew, son of United (States Senator Petti-grew, has arrived there and - has joined voinniaiiuu.ni uenerau coins s stall.