 Throughout his early career , although determined to become a musician , Beer found it difficult to decide between playing and composition . Certainly other professionals in the decade 1810 – 1820 , including Moscheles , considered him amongst the greatest virtuosi of his period . He wrote during this period numerous piano pieces , including a concerto and set of variations for piano and orchestra , but these have been lost . To this period also belongs a Clarinet Quintet written for the virtuoso Heinrich Baermann ( 1784 – 1847 ) who remained a close friend of the composer . 
 Throughout his early career , although determined to become a musician , Beer found it difficult to decide between playing and composition . Certainly other professionals in the decade 1810 – 1820 , including Moscheles , considered him amongst the greatest virtuosi of his period . He wrote during this period numerous piano pieces , including a concerto and set of variations for piano and orchestra , but these <a href='been_done' title='1'><mark>have</mark></a> been lost . To this period also <a href='uninflect' title='2'><mark>belongs</mark></a> a Clarinet Quintet written for the virtuoso Heinrich Baermann ( 1784 – 1847 ) <a href='null_relcl' title='3'><mark>who</mark></a>remained a close friend of the composer . 
Throughout his early career , although determined to become a musician , Beer found it difficult to decide between playin and composition . Certainly other professionals in da decade 1810 – 1820 , including Moscheles , considered him amongst the realest virtuosi of his period . He wrote durin dis period numerous piano pieces , including a concerto and set of variations fir piano and orchestra , but dese done been lost . To tdisperiod also belong a Clarinet Quintet written fa tdavirtuoso Heinrich Baermann ( 1784 – 1847 ) remained a close friend of the composer .